Design standards and specifications

Design Manual for Roads and Bridges (DMRB)

DMRB defines the requirements for every aspect of our road infrastructure

Manual of Contract Documents for Highway Works (MCHW)

Our standard suite of specification documents, included within our construction contracts

Have you got an idea, query or challenge to one of our standards?

If you would like to give feedback on one of our Design Manual for Roads and Bridges (DMRB) or Manual of Contract Documents for Highway Works (MCHW) standards, please use our feedback form.

Operational Technology Specifications Library (OTSL)

The OTSL contains specification documents for Operational Technology products and services. It was formerly known as the TSS Plans Registry.

Asset Data Management Manual (ADMM)

The requirements for creating and managing data for us. This page also contains Routine and Winter Service Code and Network Management Manual.

Good design

Putting sustainability and climate change at the heart of future road design

Carbon emissions calculation tool

Calculating carbon emissions for operational, construction and maintenance activities

Using drones

Principles you need to follow if flying drones on our behalf - or near our network

Highest safe speed in roadworks

Implementing the highest safe speed while maintaining the safety of our roadworkers and users.