A30 Chiverton to Carland Cross

Upgrading the A30 single carriageway between Chiverton Cross and Carland Cross roundabouts. As part of our Strategic Road Network, the A30 is a road of strategic importance, which is why an £8m contribution from the European Regional Development Fund has been committed, as well as being identified as part of the Government’s Roads Investment Strategy.

Start date March 2020
End date 2024
Cost £330 million

Latest updates

  • 29 February 2024

    Overnight closures - March 2024

    To allow us to carry out work on the Chiverton flyover and other infrastructure along the route, the following closures will be in place:

    Overnight closures  - Monday 4 March to Friday 8 March - A30 Boxheater to Scorrier, 8pm to 6am 

    Weekend closure - Friday 8 March to Monday 11 March - A30 Boxheater to Scorrier, 8pm Friday evening  to 6am Monday morning

     

    Diversion

    Traffic for all closures will be diverted via the B3285, A3075 and B3277 with different routes for HGVs, see below.

    Local access north and south at the new Chiverton interchange and via the B3284 at Chybucca will be maintained throughout these closures.



    Please plan ahead and allow extra time for your journeys during these closures.

    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here.

    For more detail on project design, planning and the Development Consent Order, please visit the A30 section of the Planning Inspectorate website here.

    Advance notice of A30 closures during March and April 2024  

    Overnight - 18 to 22 March

    Weekend - 22 to 25 March

    Overnight - 8 to 12 April

    Weekend - 12 to 15 April

    Overnight - 22 to 26 April

    Weekend - 26 to 29 April


    These dates are subject to change, the location of these closures will be confirmed nearer the time.

  • 23 February 2024

    Progress update: new A30 dual carriageway enters final stages

    We’re now in the final stages of our A30 Chiverton to Carland Cross upgrade project and will soon be preparing for the opening of the new dual carriageway later this year, before the school summer holidays.

    Since the scheme received its Development Consent Order in February 2020, we’ve faced some significant challenges but despite these, we’ve made good progress.

    The original Delivery Plan target date to open the new dual carriageway to traffic was the end of March 2024. However, since the start of construction, the programme of work has had to adapt to the effects of both the pandemic and growing weather challenges.

    Between January 2021 and August 2023 there were 14 Met Office classified storms and since last August alone there have been an unprecedented total of 10 storms affecting Cornwall. As a result of the impact of the recent bad weather, we’re now expecting the road to be open for traffic in June.

    Looking east, the new Chiverton interchange

    Looking east, the new Chiverton interchange will soon have four lanes of the new dual carriageway carrying traffic.

    The recent Chiverton flyover and Chybucca junction openings were significant milestones for the project and we’ll now be progressing with work on the new Carland Cross junction and ‘green bridge’ structure at Marazanvose.

    Nick Simmonds Screech, National Highways Project Director, said: “Following a recent review of the programme, we are now on schedule to open the new road to traffic in June, a matter of weeks after our Delivery Plan open-for traffic commitment.

    “Given the effects of the pandemic and the delayed start to the construction programme, and against all the challenges thrown at us by recent weather events, we still look on this as a significant achievement.

    “Once the new dual carriageway’s open, and well before the start of summer school holidays, this will make a significant and positive difference to the journeys of both local communities and businesses, and to the wider travelling public.”

    The new Chybucca junction

    The new Chybucca junction, with the print of the new A30 stretching into the horizon.

    Some key achievements for the project over the last two years include:

    • Removal of the ‘Chivvy’ roundabout, Cornwall’s worst accident hot-spot
    • Construction of the new Chiverton interchange and flyover
    • Construction of the Chybucca junction, allowing for north-south access across the A30
    • Installation of the new Tolgroggan bridge near Zelah, and removal of the old bridge
    • Construction of the new ‘green bridge’ at Marazanvose, which will see planting to follow later
    • Completion of the archaeological excavation and fieldwork
    • Completion of heathland translocation work near Carland Cross
    • Construction of a bat house and 33 multi-species animal crossing points
    • Construction of 16 attenuation points to improve water quality and improve wildlife habitats

    Once the new road is open, finishing works – including local authority road refinements, landscaping, planting, Cornish hedging and other environmental and ecological work – will continue.

    The Carland Cross junction

    Work will be focussed on the Carland Cross junction and the new A30 alignment, pictured here looking eastbound, in the coming weeks

    We’d like to thank road users and the local community for their patience while we complete this complex project and we apologise for any disruption caused.

    For more information, you can:

    You can also follow us on X and Facebook for up-to-date scheme information and updates on roadworks across the region.

  • 14 February 2024

    UPDATE - forthcoming closures in February

    Closure of the A390 

    There will be a closure of the northern section of the A390 between the Chiverton interchange and Penstraze Lane,  Friday 16 February at 7pm until Monday 19 February at 6am

    The A30 between Carland Cross and Scorrier will remain open during the weekend and the diversion route for access will be via the A390, A39, A393 and the A3047. You can view the diversion route and full details of the closure here

    Drivers are advised to follow the diversion routes and not to use local roads through villages that are less able to accommodate additional traffic. If travelling to Truro or the Royal Cornwall Hospital from the east, drivers should take the A39 at Carland Cross. 
    Overnight closures of the A30 
    19 to 22 February
    There will be overnight closures of the A30, 8pm until 6am the following morning, as follows: 
    • Monday 19 February - closure between Scorrier and Boxheater, diversion routes can be found here.
    • Tuesday 20, Wednesday 21 & Thursday 22 February - closures between Scorrier and Carland Cross, diversion routes can be found here.
    Weekend closure of the A30 
    23 to 26 February
    There will be a weekend closure of the A30 between Boxheater and Scorrier from Friday 23 February at 8pm until Monday 26 February at 6am. Traffic will be diverted via the B3285, A3075 and B3277 with different routes for HGVs. You can view the diversion routes here.

    For all of the above closures, local access north and south at the new Chiverton interchange and via the B3284 at Chybucca will be maintained throughout. 

    Please plan ahead and allow extra time for your journeys during these closures.
     
    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here.

    Advance notice of A30 closures during March 2024  
    • Overnight - 4 to 8 March
    • Weekend - 8 to 11 March
    • Overnight - 18 to 22 March
    • Weekend - 22 to 25 March
    These closures are usually between Scorrier and Boxheater and subject to change. We will send full details in due course once confirmed. 

  • 02 February 2024

    Overnight closures - February 2024

    9 to 12 February - A30 weekend closure

    There will be a weekend closure of the A30 between Boxheater and Scorrier from Friday 9 February at 8pm until Monday 12 February at 6am. Traffic will be diverted via the B3285, A3075 and B3277 with different routes for HGVs. You can view the diversion routes here.

    For this closure, local access north and south at the new Chiverton interchange and via the B3284 at Chybucca will be maintained throughout. The weekend will be focused on drainage, concreting, central reservation work, barrier construction, bridge related construction activities and a traffic switch at Trevalso. 

    16 to 19 February - A390 weekend closure of the A390 

    There will be a weekend closure of the northern section of the A390 between the Chiverton interchange and Penstraze Lane from Friday 16 February at 7pm until Monday 19 February at 6am

    The A30 between Carland Cross and Scorrier will remain open during the weekend and the diversion route for access will be via the A390, A39, A393 and the A3047. You can view the diversion route and full details of the closure here

    Drivers are advised to follow the diversion routes and not to use local roads through villages that are less able to accommodate additional traffic. If travelling to Truro or the Royal Cornwall Hospital from the east, drivers should take the A39 at Carland Cross. 

    Please plan ahead and allow extra time for your journeys during these closures.

    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here.

    For more detail on project design, planning and the Development Consent Order, please visit the A30 section of the Planning Inspectorate website here.

    Advance notice of A30 closures in February & March 2024  

    • Overnight - 19 to 23 February
    • Weekend - 23 to 26 February
    • Overnight - 4 to 8 March
    • Weekend - 8 to 11 March

    These closures are usually between Scorrier and Boxheater and subject to change. We will send full details in due course once confirmed. 

    Please note: the overnight closures scheduled for 5 to 9 February are no longer required.

  • 19 January 2024

    Further road closures begin next week

    The A30 will be closed overnight on Monday 22 and Tuesday 23 January between Boxheater and Scorrier.  Traffic will be diverted via the B3285, A3075 and B3277 with different routes for HGVs. You can view the diversion routes here.

    The overnight closures will then expand on Wednesday 24, Thursday 25 and Friday 26 January with the A30 closed between Scorrier and Carland Cross. Traffic will be diverted via the A3076/A3058, the A3075 and the B3277, with different routes for HGVs.  You can view the diversion routes here.

    The A30 will then be closed between Boxheater and Scorrier for the rest of the weekend from Saturday 27 January at 6am until Monday 29 January at 6am. Traffic will be diverted via the B3285, A3075 and B3277 with different routes for HGVs. You can view the diversion routes here.

    Overnight closures start at 8pm and finish at 6am.

    For all closures, local access north and south at the new Chiverton interchange and via the B3284 at Chybucca will be maintained throughout. These closures will be focused on drainage, concreting, central reservation work, barrier construction, and bridge related construction activities along the new A30. 

    Please plan ahead and allow extra time for your journeys during these closures.

    Advance notice of closures during February 2024
    • Overnight closures between Scorrier and Boxheater - 5 to 9 February - cancelled 
    • Weekend closure between Scorrier and Boxheater - 9 to 12 February
    • Weekend closure of the northern section of the A390 near Chiverton - 16 to 19 February (this is coordinated with Cornwall Council work and full details will be communicated to local residents in due course)
    • Overnight closures between Scorrier and Boxheater - 19 to 23 February
    • Weekend closure between Scorrier and Boxheater - 23  to 26 February

    These closures are subject to change, and we will send full details in due course once confirmed. 

    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here.

  • 04 January 2024

    Overnight closures - January 2024

    The A30, Scorrier to Boxheater, will be closed overnight on Monday 8, Tuesday 9 and Wednesday 10 January. The closures will start at 8pm and finish by 6am. These closures will be focused on surfacing, central reservation work and concrete wall preparation work near Marazanvose.

    This will be followed by a weekend closure from Friday 12 January at 8pm until Monday 15 January at 6am. This closure is for concrete wall preparation work near Chiverton and there will also be drainage and maintenance work across the new A30 route.

    Both sets of closures will be from Scorrier to Boxheater. The diversion route for standard vehicles will follow the B3285, the A3075 and the B3277. There will as usual be longer diversions for HGVs and other high sided vehicles - you can find all the routes here. Local access north and south at the new Chiverton interchange will be maintained throughout.

    Please plan ahead and allow extra time for your journey during these closures.
     

    Advance notice of further closures in January 2024
    • Overnight closures of the A30 between Scorrier and Boxheater - 22 to 26 January
    • Full weekend closure of the A30 between Scorrier and Boxheater - 26 to 29 January

    These closures are subject to change, and we will send full details in due course once confirmed. 

    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here

  • 19 December 2023

    Christmas 2023 newsletter

    We are now in the final stage of the project – huge progress has been made in 2023 and we are now preparing for the opening of the new A30 in 2024.

    Last week we partially opened the Chiverton flyover - a major milestone for the project. This has alleviated congestion as we now have one lane of east-west traffic in either direction bypassing the interchange without queuing. Local journeys north and south are also improved as drivers will no longer have to interact with the A30 mainline traffic.

    For the full newsletter please click here: https://mailchi.mp/21c4c06f2806/a30-chiverton-to-carland-cross-newsletter-issue-13561348

     

  • 14 December 2023

    UPDATE - overnight closure 14 December 2023

    Our final road closure of 2023 is taking place Thursday 14 December from 8pm until Friday 15 December at 6am. The A30 will be closed between Chybucca and Scorrier. 

    Despite the continuing bad weather, we are planning to open part of the Chiverton flyover to traffic early Friday morning (15 December). We had hoped to do this last weekend but the heavy rain delayed the programme of work. This is a major milestone for the project as it will help to alleviate congestion around the new Chiverton interchange and move the project one step closer to completion.

    The partial opening of the flyover will see one lane of east-west traffic in either direction bypassing the interchange without queuing and will also improve local journeys north and south as drivers will no longer have to interact with the A30 mainline traffic. You can view a plan of the new layout here.

    For this closure between Chybucca and Scorrier, traffic will have the option of diverting along the B3285, A3075 and B3277 as usual or staying on the A30 and diverting onto the B3284 north at Chybucca. There are longer diversions for HGVs and you can view all routes here


    We would like to thank you for your patience this year during the changes and closures on the A30.  Please plan ahead and allow extra time for your journey during this closure. 
     

    Advance notice of closures in January 2024

    • Overnight closures of the A30 between Scorrier and Boxheater - 8 to 12 January
    • Full weekend closure of the A30 between Scorrier and Boxheater - 12 to 15 January
    • Overnight closures of the A30 between Scorrier and Boxheater - 22 to 26 January
    • Full weekend closure of the A30 between Scorrier and Boxheater - 26 to 29 January

    These closures are subject to change, and we will send full details in due course once confirmed. 

    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here

  • 07 December 2023

    UPDATE - weekend closure 8 to 11 December 2023

    It had been hoped to open the Chiverton flyover to traffic on Monday, but the current weather event has prevented the laying of road materials and delayed the programme of work.

    As a result of the postponement of the Chiverton flyover partial opening, this weekend will see a lesser closure of the A30, between the temporary Chiverton interchange and Boxheater.

    The closure, from 8pm Friday 8 December to 6am on Monday, 11 December, will see traffic diverted from Boxheater on the A30 via the B3285 and the A3075 to rejoin the A30 at the Chiverton interchange, with the eastbound diversion route operating in reverse.

    Caption: The diversion routes in operation for the weekend closure

     

    From Monday drivers travelling north to south across the A30 at Chybucca will no longer have to negotiate traffic signals, instead using the new layout below: 

     

  • 30 November 2023

    Overnight closures - December 2023

    There will be overnight closures of the A30 between Scorrier and Boxheater from Monday 4 December until Friday 8 December. The A30 will be closed from 8pm until 6am each night. 

    There will then be a weekend closure of the A30 between Scorrier and Boxheater from Friday 8 December at 8pm until Monday 11 December at 6am.

    The overnight closures are for the installation of Cornwall Council's new bridge at Chiverton (part of the Saints Trails), while the weekend will focus on the opening of two lanes of the Chiverton flyover as part of ongoing junction work, and the opening of the new B3284 link from the south across the A30 at Chybucca.

    The new layout at Chiverton, which will mean that east west traffic can bypass the roundabout, can be found here.

    The new layout at Chybucca which will reconnect the B3284 north and south can be found here.


    **Please note that there will be no access from the B3284 north or south over the A30 during the weekend of 8 to 11 December due to construction work required.**

     For all of these closures, traffic will be diverted along the B3285, A3075 and the B3277, with longer diversions signed for high sided vehicles via the A39 or A390, due to the low bridge at Scorrier. You can view the diversion routes here. Chiverton Junction will remain operational for access north and south of the A30. 

    Please plan ahead and allow extra time for your journeys during these closures.
     

    Advance notice of closures in January 2024
    • Overnight closures of the A30 between Scorrier and Boxheater - 8 to 12 January
    • Full weekend closure of the A30 between Scorrier and Boxheater - 12 to 15 January
    • Overnight closures of the A30 between Scorrier and Boxheater - 22 to 26 January
    • Full weekend closure of the A30 between Scorrier and Boxheater - 26 to 29 January

    These closures are subject to change, and we will send full details in due course once confirmed. 

    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here

  • 14 November 2023

    Weekend closure 17 - 20 November

    There will be a weekend closure of the A30 between Scorrier and Boxheater from Friday 17 November at 8pm until Monday 20 November at 6am. This closure is for drainage work between Scorrier and Chiverton, carriageway widening near Tolgroggan bridge in readiness for a traffic realignment in December, and earthworks around Marazanvose.

     Most traffic will be diverted along the B3285, A3075 and the B3277, with a longer diversion for high sided vehicles. You can view the diversion routes here

    Please plan ahead and allow extra time for your journey during these closures. 

    We are still working towards opening part of the flyover at Chiverton before the end of the year. However, the overall programme and installation of the pedestrian bridge at this location may impact on this. We will provide an update prior to the next weekend closure. 


    Advance notice of closures in December

    Overnight closures of the A30 between Scorrier and Boxheater - 4 to 8 December
    Full weekend closure of the A30 between Scorrier and Boxheater - 8 to 11 December


    These closures are subject to change, and we will send full details in due course once confirmed. 

    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here

  • 23 October 2023

    Overnight closures 30 October to 3 November and weekend closure 3 to 6 November + storm Ciarán cancellations

    Storm  Ciarán - overnight closures for  1  and 2 November have been cancelled due to amber weather alert.

    The remainder of this week's overnight closures, as listed below, are planned to go ahead please check back here for updates. Should you have any queries regarding the works, please contact our project helpline on 0845 600 2664.

     


    Overnight closures - 30 October to 3 November

    There will be overnight closures of the A30 between Chiverton and Carland Cross from Monday 30 October to Friday 3 November - 8pm in the evening to 6am the following morning. These closures will allow us to carry out preparation work ahead of the forthcoming weekend closure. Traffic will diverted via the A3076/A3058 and the A3075, you can view the diversion route here.

    Weekend closure - 3 to 6 November

    There will be a weekend closure of the A30 between Chiverton and Boxheater from Friday 3 November at 8pm in the evening until Monday 6 November at 6am. This closure will be used to switch traffic under the new Marazanvose green bridge, so we can continue construction over the existing A30.  Traffic will be diverted along the B3285 and the A3075, you can view the diversion route here

    Please plan ahead and allow extra time for your journeys during these closures. 

    Advance notice of closures in November and in December

    • Full weekend closure of the A30 between Scorrier and Boxheater - 17 to 20 November
    • Overnight closures of the A30 between Scorrier and Boxheater - 4 to 8 December
    • Full weekend closure of  the A30 between Scorrier and Mitchell - 8 to 11 December

    These closures are subject to change, we will send full details in due course once confirmed. 

    For a simple plan of the new A30 dual carriageway layout and the connections with the de-trunked existing A30 once the project is complete, please click here

     

    Please note:

    The A30 will be closed for routine maintenance (lining and stud replacement work) between Highgate (Indian Queens) and Mitchell overnight from 8pm to 6am as follows (subject to traffic flows). 

    • 6 to 9 November – the westbound carriageway (Highgate to Mitchell) will be closed
    • 9 to 11 November and 20 to 22 November – the eastbound carriageway (Mitchell to Highgate) will be closed

    A diversion will be in place via A39, A392, A3058 and A3076 westbound and vice versa during eastbound closures.  

    This is not within the A30 Carland to Chiverton major project, if you would like further information about this work, please contact National Highways Customer Contact Centre on 0300 123 5000 open 24/7, who will direct your enquiry to the most appropriate person, or email: info@nationalhighways.co.uk

  • 05 September 2023

    Overnight closures 11 to 14 September and weekend closure 15 to 18 September

    Overnight closures Scorrier to Boxheater: 11 - 14 September, 8pm to 6am
    Overnight closures will be needed to carry out preparation work ahead of the weekend closure. This will see the start of construction of the new section of dual carriageway linking  Carland Cross junction to the existing A30.

    The A30 will be closed in both directions between Scorrier and Boxheater  from 8pm to 6am the following morning.

    Traffic will be diverted via the B3285, the A3075 and the B3277. 

     

    A30 weekend closure  Scorrier to Boxheater: 15 - 18 September
    Following the summer school holidays, we are resuming closures to work towards the opening of the new road. The A30 will be closed between Scorrier and Boxheater from 8pm on Friday 15 September until 6am on Monday 18 September.

    During this weekend closure we will:

    • demolish the old Tolgroggan bridge
    • progress work to open the B3284 Chybucca link as part of the new junction
    • switch traffic at Chiverton
    • create tie ins to the new A30 dual carriageway

    The above diversion route will be in place.

    Please plan ahead and allow extra time for your journey. 

     

    Lane closures from Carland Cross to Mitchell during September 2023
    From 3 September to the end of the month, there will be lane closures in both directions between Carland Cross and Mitchell. This includes the westbound approach to Carland Cross.

    At the end of the month the A30 between Mitchell and Carland Cross will be changed to a contraflow (one lane in either direction) until the opening of the new road.

    Advance warning of future weekend closures:

    3 to 6 November 2023 -
    Scorrier to Boxheater *

    * The date and location is subject to change - full details will be posted in due course.

  • 15 August 2023

    Overnight closures cancelled between Chiverton and Boxheater

    The overnight A30 closures between Chiverton and Boxheater, which were scheduled for Monday 21 to Friday 25 August 2023, have been cancelled.

    Work to progress the B3284 Chybucca link and create tie ins to the new A30 dual carriageway will now take place using temporary traffic lights overnight and during future closures.

    There will be no weekend closures during the school holidays. The next weekend closure is scheduled for 15 to 18 September 2023. Full details will be shared about this and related overnight closures in due course.

  • 01 August 2023

    Summer 2023 newsletter

    For a full rundown of our progress to date, upcoming works, scheme photos, and much more, please follow this link A30 Chiverton to Carland Cross - scheme newsletter: Summer 2023 (forward-to-friend.com)

    Overnight closures will be in place between Chiverton and Boxheater

    • Monday 21 to Friday 25 August, 8pm to 6am.

    Diversion route

    As our works continue, we ask you to;
    • plan your journeys to allow yourself time to reach your destination
    • not follow Sat-Navs as they take time to catch up with the new road layout so follow the signs provided and use the lanes stated on the signs
    • be mindful of your impact on local roads and use the main roads and official diversion routes where you can

     

  • 06 July 2023

    Weekend closure 14 - 17 July and overnight closures 17 to 21 July

    A30 closure over the weekend of 14 - 17 July 2023

    A full weekend road closure will take place between the new Chiverton interchange and Boxheater from 8pm on Friday 14 July to 6am on Monday 17 July, all traffic will be diverted via the B3285 and the A3075.

    This will allow us to carry out major earthworks and complete a series of road tie-ins to the new A30. This is the last weekend closure ahead of the summer getaway. Full details and an update on the new Chiverton interchange can be found here: https://mailchi.mp/d63fbe19f602/a30chiverton-to-carland-cross-13544436

    Diversion route for weekend closure 14 to 17 July  Diversion route weekend closure 14 to 17 July

     

    Overnight road closures 17 to 21 July to install a new temporary layout at Carland Cross

    Following the weekend road closure between Chiverton and Boxheater, the A30 will be closed overnight every night, 8pm until 6am, from Monday 17 to Friday 21 July between the new Chiverton interchange and Carland Cross.

    The overnight diversion route for through traffic will be well sign posted. All through traffic will be diverted via the A3076/A3058 and the A3075. Local traffic will be able to access the A39 to and from Truro as usual. Please plan ahead and allow extra time for your journey. 



    There will be no weekend closures during the school holidays and limited overnight closures. The next weekend closure is anticipated to take place in mid-September 2023.

    Following the overnight closures, a new temporary layout will be in place using the existing Carland Cross roundabout and new infrastructure that will form part of the junction - it will look like this:

    This will be the next milestone for the project as a new temporary link from Carland Cross to the A30 is introduced to prepare for the construction of a flyover later in the year as part of a new junction. The existing A30 is being realigned to allow the removal of the plant crossing currently in place and facilitate a major earthworks programme. This will remove any interface between our vehicles and the traveling public and allow significant volumes of material to be moved during the summer months.

  • 28 June 2023

    Overnight closures 29 and 30 June

    Overnight road closures on the A30 between Chiverton and Boxheater

     

    We’ll be closing the A30 overnight from Chiverton Cross to Boxheater for two nights next week,

    Thursday 29 June and Friday 30 June. The road will be closed each night from 8pm - 6am.

     

    The closure is required for us to undertake a traffic switch at Trevalso and associated works in the area.

     

    For further details, please click here: https://mailchi.mp/72e29685fa69/a30chiverton-to-carland-cross-13543556

  • 31 May 2023

    Weekend closure 16 - 19 June

    We've reached a major milestone on the project and will be installing the new Chiverton Cross interchange in June. To do this safely, we will be closing a section of the A30 (from 8pm) and part of the A390 (from 7pm) Friday 16 June - 6am Monday 19 June 2023.

    We will have diversion routes in place but expect delays in the area. Public transport will still be operating. Please plan ahead for any journeys, allow extra time and avoid the area if possible.

    Closure details

    • We will be closing the A30 between Scorrier and Boxheater from 8pm on Friday 16 June until 6am on Monday 19 June.
    • The A390 will also be closed during the weekend from Chiverton to Langarth Park & Ride from 7pm Friday 16 June to 6am Monday 19 June.
    • Diversion routes will be in place for all closures and agreed with Cornwall Council.
    • Eastbound - all traffic will be diverted via the A3075 to Goonhavern and the B3285 to re-join the A30 at Boxheater. This diversion will operate in reverse for local traffic heading westbound.
    • Westbound  - through traffic and HGV’s will be diverted via the A39, A393 and A3047. Please also use this route to access Truro.
    • Access will be maintained across the A30, via the B3284 at Chybucca for emergency services’ vehicles and key bus routes only.

    You can download the diversion route here.

    Will it look different after the weekend?

    Following the weekend, traffic will use a new layout at Chiverton.  The new layout will keep access open to the A390, A3075 and B3277 while we continue our work this year.

     

    Come and see us

    On the 8 and 9 June, the project team will be out and about in National Highways’ mobile exhibition van. Come say hi and find out more about our upcoming work. Dates, times and locations are as follows:

    Thursday 8 June between 11am to 7pm at Treliske Retail Park, Tresawls Road, Truro TR1 3LN (next to the Royal Cornwall Hospital).

    Friday 9 June between 7am to 3pm at Lemon Quay, in Truro city centre, TR1 2LW.

  • 12 May 2023

    May full weekend road closure

    We'll be fully closing the A30 between Chiverton and Boxheater, from 8pm on Friday 19 May to 6am on Monday 22 May.

    What is happening?
    The closure is required to realign the A30 carriageway at Zelah. We will also be undertaking a range of other works at various locations along the closed section of road.

    The official diversion route will be well sign posted and can be viewed below or here.

    Please plan ahead and allow a little extra time for your journey.

    The Chevron Traffic Safety Control Officer helpline number, for landlocked residents whose only way out is onto the A30 and who need access during the weekend is 07918 586974, a resident's pass will be provided. A safety vehicle will attend and escort you out of the closure area.

    Whilst the road realignment works at Zelah are not anticipated to cause any delays, our advice to motorists is to be aware of the road layout changes, follow new signs and please take extra care as you familiarise yourself with the new road alignment.


    We apologise for any inconvenience these works may cause.

    Should you have any queries regarding the works or the closures, please contact our project helpline on 0845 600 2664.

  • 21 February 2023

    Tolgroggan bridge lift – progress update

    We installed a new bridge over the A30 in double-quick time last weekend as part of our Chiverton to Carland Cross road dualling scheme in Cornwall.

    The Tolgroggan access bridge has spanned the A30 near Zelah for 32 years and needed to be replaced to accommodate the new dual carriageway and the existing road between the Chiverton and Carland roundabouts.

    Despite mist and mizzle, weather conditions and wind speeds remained suitable for the lifting operation and the new 137ft (42-metre) twin-beam overbridge was lifted into place by a 650-tonne crawler crane on Saturday afternoon.

    Our Engineers then undertook tying-in work on the bridge, dismantling and transporting of the crane and extensive site and traffic management clearance. We managed to reopen the A30 to motorists at 2pm on Sunday – some 16 hours ahead of the anticipated opening on Monday morning.

    The new bridge weighs 275 tonnes, the equivalent weight of 23 double decker buses or 887,097 standard Cornish pasties and will eventually span the existing A30 road and four lanes of the new carriageway.

    You can see a timelapse footage of the weekend works in the video below.

    Now in position, our work will concentrate on construction of the new road, with the existing bridge to be demolished later this year.

    Neil Winter, National Highways Senior Project Manager for the A30 Chiverton to Carland Cross upgrade, said: “We thank people for their patience and co-operation while we carried out the work. The operation went as planned and although the weather wasn’t the greatest, conditions were favourable and the preparation work paid dividends.

    “It’s a key milestone for the project, and now that we have the new bridge in place we will be able to switch our attention to the other structures along the route.

    “As part of the scheme, we’re building 13 new structures in all, both under and over the new A30, with one existing underbridge at Two Burrows, a short distance from Tolgroggan, being refurbished.”

  • 11 January 2023

    Progress update

    We’ve continued to work on all the structures, this included pouring concrete bridge decks at Chiverton, Chybucca, Tolgroggan and Carland. We’ve also installed bridge beams at Marazanvose allowing us to plan for the concrete deck pour and other work on this structure.

    We’ve made good progress on our drainage work with the use of a specialist trenching machine in areas where there is hard rock.

    We also completed our roadworks between Chybucca and Chiverton. This meant that we were able to realign the A30 through the Four Burrows and Chiverton junction area at the beginning of December.

    Next steps

    We’re getting ready to install a new bridge at Tolgroggan. This will replace the existing bridge which we will demolish later this year. We will need a weekend closure of the A30 to carry out this work safely, we’re just finalising our plans and will provide an update on the date for this shortly.

    Bridge beams being lifted into place last year for the new bridge at Tolgroggan

    Over the next few months we’re aiming to complete the:
    • underbridges at Chiverton East and Carland Cross
    • road surfacing in the Hill View area on the A30 westbound carriageway
    • roadworks at Henver Lane.This will allow access to the northern part of the new Trevalso Lane underbridge to start over the next few months.

    We will also be:
    • changing the traffic management at Trevissome Park to allow access to the A390
    • realigning the A30 at Zelah so that we can start work on the underbridge there.

  • 10 August 2022

    Cornish home produce is core to National Highways’ greener A30 road upgrade

    Cornwall’s very own china clay mining industry is playing a big part in the construction of our major A30 Chiverton to Carland Cross upgrade.

    Sustainability and reducing the carbon footprint are key drivers behind construction of the 8.7-mile dualling scheme, and to that end contractors Costain Jacobs and supply chain Aggregate Industries are tapping into natural Cornish materials and a significant investment in local companies.

    Larger infrastructure projects typically use millions of tonnes of aggregate – representing a large carbon footprint – but as with other modern-day road building schemes, the A30 project is utilising a by-product from the china clay mining industry.

    The residue, known as stent, would normally have no use and be left in white spoil heaps, scarring the local landscape. Instead, the material from the Littlejohns Pit near St Austell is being processed into sustainable secondary sand and aggregate for construction use.

    And just down the road, this is now being used as an engineering alternative across the A30 project, not only reducing the embodied carbon but also saving on the transport carbon cost.

    Compared to the 5kg Carbon Dioxide equivalent (CO2e) per tonne carbon emission of virgin aggregate, the locally imported material is around 2kg CO2e per tonne, representing a reduction of around 3kg CO2e per tonne of aggregate used.

    Added to that, Aggregate Industries has also invested over £4 million in the nearby Melbur Quarry at St Stephen to produce more carbon friendly warm mix asphalt for the new road surfacing.

    Fully approved by National Highways, warm mix asphalt is a greener process that has less impact on the environment, with reduced hydrocarbon emissions and greenhouse gases. Due to its lower temperature, it is also safer for construction workers to use.

    Warm mix asphalt is produced using temperatures up to 49 degrees Celsius lower than that used for traditional hot mix asphalt so less energy is needed in the heating process, meaning less fuel and a reduction in the plant's carbon footprint.

    Roads Minister Baroness Vere said:

    “The A30 Chiverton to Carland Cross upgrade will reduce congestion, improve journey times and provide much-needed connection for local businesses.

    "By using natural Cornish materials, we are also ensuring the scheme has a much lower carbon impact and provides a further boost to the local community, which is exactly the kind of innovation we want to see as we strive towards a net zero road network.”

    Nick Simmonds-Screech, National Highways Project Director for the A30 scheme, added:

    “We’re already really proud of our environmental and ecological work – we’re forecasting a net biodiversity gain in the region of 20% – and this greener way of working also spreads to our construction methods and material supply.

    "We all have a part to play in reducing our carbon footprint and adapting to climate change, and modern road building methods are certainly playing a part in this.

    “The move towards warm mix asphalts allows us to not only achieve huge efficiency savings but also reduce carbon as we strive for net zero by 2040.

    “Carbon reduction, along with ensuring our roads provide smooth, safe, and efficient journeys for motorists, are key and something we are constantly striving to improve for generations to come.”

    As part of our Net Zero Plan, we're committed to reducing our maintenance and construction carbon emissions to net zero by 2040.

    On the Cornwall upgrade, Costain Jacobs and its contractors are also tapping into local skills and supplies as construction on the £330 million scheme progresses.

    Aside from the aggregate and asphalt production, this includes the:

    • employment of site managers and engineers from the local area
    • use of Devoran Metals for reinforcement on the project
    • daily use of a local scaffold supplier
    • use of smaller suppliers of timber products
    • engagement with local colleges and the Camborne School of Mines.

    John Lee, Costain Project Director, said:

    “It’s been good to tap into local skills and materials, we’re making excellent progress with the construction works and on course for the new road to be open to traffic in winter 2023.

    “We’re also committed to working with National Highways and its Net Zero Plan and the use of warm mix asphalts and china clay by-products is playing a big part in the A30 helping to reduce the carbon impact of construction.”

  • 02 December 2021

    Exciting archaeology finds on the A30

    Since August 2020, the A30 team have been conducting archaeology investigations to record, report and preserve the archaeological findings along the A30 Chiverton to Carland Cross scheme.

    The Archaeological Contractor, Cornwall Archaeological Unit (CAU), has discovered artefacts from the Mesolithic/Neolithic transition period (around 6,000 years ago), the Bronze age (around 4,500-3,000 years ago), the Medieval period (around 12-13th Century), and the World War Two period.

    Throughout the summer of 2021, we have hosted volunteer events to assist with our archaeological investigations in targeted areas.

    Targeted areas include Penny-Come-Quick and Ventonteague, where the finds include a clearly defined post ringfeature (pictured). We are still progressing with the excavation of the surrounding area to uncover the full archaeological background; however initial investigations show that this is likely to be the remains of a stone circle.

    Aerial view of pit ring at Penny-Come-Quick. Source: Jamie Lewis, Costain

    We are also conducting a flint scatter in an area known as Ventonteague. We have found over 6,500 flints in this area and are continuing investigations to locate the epicentre of the flint scatter activity. These flints suggest the use of Mesolithic hunting weapons, processing tools such as scrapers and  axes, suggesting an that there was an extensive knapping area at Ventonteague.

    The flint from these flint scatters is likely to have been transported from areas such as the neighbouring coastline in Devon or Somerset as flint does not naturally occur in this area of Cornwall. The knapping area at Ventonegue can therefore be indicative of a manufacturing area where a range of tools would have been produced for a variety of uses, such as for hunting game and butchering meat. Investigations have uncovered signs of a 6,000–8,000-year-old water culvert in this area, supporting the theory of repeated settlement and activity in the area.

    A core for striking blades off.

    A flint found at Ventonteague, which is a core for striking blades off. Source: Cornwall Archaeological Unit.

    Other excavations have uncovered two roundhouses in the Tolgroggan area which are likely from the Late Neolithic/Early Bronze Age and would have been used as a domestic dwelling. One roundhouse also featured a post ring (a central area of pits and post/stakeholes), flint tools and a pot located centrally in the ring centre.

    Archaeological team carefully excavating a prehistoric pot in Tolgroggan. Source: Cornwall Archaeological Unit.

    The A30 team are continuing with these archaeological investigations with the support from Cornwall Archaeological Unit and the hard-working volunteers.

    To keep in contact with the scheme, please contact A30ChivertonToCarlandCross@HighwaysEngland.co.uk or contact the Customer Contact Centre on 0300 123 5000.

  • 16 April 2020

    Development Consent Order

    We were granted a Development Consent Order (DCO) on 6 February 2020 which allows us to build the design as submitted to the planning inspectorate (PINS).

    We awarded a contract for the work to Costain on the 31 March 2020. In March, we also began preliminary works for the scheme. This includes the diversion of utilities, survey work to inform the detailed design and some site set-up work as we move through the summer.

Project information

Give us your feedback

Visit our A30 Chiverton to Carland Cross feedback tool to have your say. The tool includes an interactive map, so you can pinpoint any comments you may have about our work, or just give us general feedback.

ECHO is a one-way feedback tool, so if you'd like a response to your feedback, you can email the project team at A30ChivertontoCarlandCross@nationalhighways.co.uk

The Government’s Road Investment Strategy included a commitment to improve the A30 between Chiverton Cross and Carland Cross roundabouts to dual carriageway standard. Funding for this scheme includes a contribution from the European Regional Development Fund of £8 million towards its development costs, with a further £12 million allocated for the construction phase.

What has happened so far?

On 6 February 2020, the Secretary of State for Transport gave the go ahead for the A30 Chiverton to Carland Cross scheme to be built by granting the Development Consent Order. We then awarded the contract to the Costain Jacobs partnership; and completed detailed construction planning as well as work involving environmental and archaeological surveys. We acquired the necessary permanent and temporary land parcels and set-up site. 

In March 2020, construction works started. We worked round the issues created by Covid-19, breaking ground to build the road, construct the many underpasses and overbridges, attenuation ponds, Cornish hedge and other infrastructure.

We are constructing:

  • 10 new underpasses and underbridges
  • 3 new bridges over the new road
  • Refurbishment of an existing structure
  • Over 2.6 million cubic metres of earthworks
  • 33 new culverts and wildlife crossings
  • Nearly 29 miles of new highway drainage
  • Over 12 miles of wildlife proof fencing
  • New badger setts and bat roosts
  • 8 miles of Cornish hedge

Improving the A30 between Chiverton and Carland Cross is incredibly important for Cornwall’s future. It's the only remaining stretch of single carriageway on the A30 between Camborne and the M5 at Exeter; journeys on this part of the road are regularly delayed, congestion often brings traffic to a standstill, and as a result the Cornish economy is being held back.

For local people, particularly during the summer season, the simple act of getting to a neighbouring village can lead to unacceptably long and unreliable journeys, while opportunistic rat runners pose increased risk of accidents in their villages.

You can view our fast facts document to find out more.

The key objectives of the scheme are to:

  • Make the route between Chiverton and Carland Cross more reliable by reducing congestion, journey times and providing more space for the travelling public
  • Unlock growth, contributing to regeneration and sustainable economic growth by supporting employment and residential development opportunities
  • Connect communities and making journeys easier by separating the strategic road from local traffic on the old A30. We will provide new bridges to cross the new A30 and maintain a route for local traffic and non-motorised users
  • Design the proposed scheme to modern, safe and efficient road standards, which are suitable for the new dual carriageway
  • Protect the environment, minimising impacts and where possible delivering enhancements to the environment
  • Minimise disruption during the construction of the new road

Employment, apprenticeships, education, skills a social value legacy

We want to be part of our local community and to play a full and active part. Our community relations team engage with local schools, colleges and other educational establishments. We also engage with local community groups and anyone who has an interest in the project should get in touch with us.

We are:

  • providing support to learners and offering opportunities for them to experience the world of construction
  • employing local people, offering upskilling and apprenticeship opportunities
  • seeking local businesses, materials and suppliers to support the project
  • working with local charities and fundraising for them
  • looking for volunteering opportunities for us to help with
  • giving presentations to showcase our work.

If you are a local business and would like to register an interest, you can contact our team by emailing a30supplierenq@costain.com

If you are looking for work opportunities, you can regularly check www.costain.com/careers/ for more information.

You can also email the community relations team dave.james@costain.com or get a message to them by calling the project helpline on 0845 600 2664.

What are we doing for young people?

We have a dedicated Education, Employment and Skills (EES) Coordinator on the scheme who works with local schools, colleges, universities and JobCentre Plus to discuss any opportunities we may be able to provide. We are currently working with 5 local schools delivering Science, Technology, Engineering and Maths (STEM) activities linking in with the curriculum wherever possible.

If you're a parent or teacher interested in finding out more about the STEM project, please email the project team: A30ChivertontoCarlandCross@nationalhighways.co.uk

We have taken on a T-Qual placement from Truro & Penwith College, who comes to the project one day a week on placement.

A new outreach programme has been developed for schools and youth groups in the area that includes looking at the need and legacy of the scheme but also how National Highways uses STEM throughout its work.

Two local Colleges engaged with one being one of our main training providers. Plymouth & Exeter University are in initial discussions to host career webinars and visits for leavers wishing to progress on to post-graduateships.

 

What are we doing to protect the environment?

At National Highways, we are committed to making the environment a priority. The scheme continues to protect the environment minimising impact from construction activities and deliver enhancements.

Surveys have been undertaken of river water quality, heathland, grassland, hedgerows, fish, breeding birds, reptiles, barn owls, dormice, otters, badgers and nightjars.

Prior to the start of construction activities, to protect and preserve the rich heritage of the area, archaeological landscape surveys took place.

Over 29 miles of new drainage will be constructed to protect the local area and water courses. The scheme will construct ponds to store and control the flow of surface water, install 33 new culverts and wildlife crossings.

Over 12 miles of wildlife proof fencing is being constructed, including badger fencing directing badgers to specially designed wildlife crossings, which will complement the three new specifically designed badger setts and nine otter crossing tunnels. A new bat roost has been built to replace an existing stone barn.

Construction of eight miles of Cornish hedge, representing a net gain of nearly seven miles of stone built Cornish hedge.

Heathland that was in the footprint of the new road is being translocated to its new home at Carland Cross. The reptiles in the Heathland area are being translocated to the Newlyn Downs SSSI ahead of the heathland translocation. Hibernacula have been built in the SSSI to ensure that the habitat can support the additional population through the hibernation season.

Planting of species rich grassland and trees native to Cornwall will blend the new with the old.

There will also be:

  • Nine crossing tunnels specifically for otters
  • Otter ledges in two of the culverts
  • 21 crossings designed to protect connectivity for bats
  • No artificial lighting on the main route or at junctions, removing any light pollution from the new road
  • The construction of earth barriers and sound-absorbing fencing at key locations to reduce noise impact of the new road

We spoke to Ali Thomas, Costain's Environmental Manager for the scheme, to tell us more about what she and her team are doing on site - you can watch the full video below.

Documents

Traffic management

You can find the latest updates about the new entry and exit for Trevissome Park here. 

The DCO process was established by the Planning Act 2008 and is used for certain large and complex schemes (including highway improvements) that have been designated as a Nationally Significant Infrastructure Project (NSIP) by the Government.

The benefits of the DCO process include extensive pre-application consultation, detailed analysis, including a full Environmental Impact Assessment, and examination by an independent inspector before the final decision is made.

The Secretary of State for Transport granted development consent for the A30 Chiverton to Carland Cross Development Consent Order (DCO) on 06 February 2020. Links to key DCO documentation can be found below:

The made DCO is Statutory Instrument 2020 No. 121 and is available to view at legislation.gov.uk.

Development Consent Order – Requirements Register

Requirements are conditions that have been included in the DCO, which control how the project must be implemented (constructed and maintained). Implementing the DCO in accordance with these conditions involves completing consultation and approval processes that have been defined in the DCO. These processes are referred to here and in the DCO as “discharging” the requirements.

This Requirements Register is a live document and will be updated as the process to discharge the requirements progresses.

The latest version will always be published below:

View the Requirements Register.

This register will be maintained for three years following completion of the project. The register sets out:

  • each requirement
  • whether the requirement needs approval by the Secretary of State (or other duty holder)
  • whether any approval has been applied for or given

Traffic information

Information about scheduled roadworks and events on our motorways and major roads.

Sign up for updates!

Keep up to date with what's happening on this scheme by signing up to our updates.

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