Published standards and specifications are routinely reviewed and updated to reflect best practice. We welcome feedback on our standards from suppliers and other stakeholders. If you would like to give feedback on or have any queries relating to one of our Design Manual for Roads and Bridges (DMRB) or Manual of Contract Documents for Highway Works (MCHW) standards, please use the feedback form.
Where applicable, the feedback you provide will be forwarded to the technical author responsible for the document, and a response sent to you shortly.
The Manual of Contract Documents for Highway Works (MCHW) was modernised and republished 30 September 2025. If your query relates to these updates, please refer first to the MCHW Information hub which includes essential guidance to support the transition to the updated MCHW.
For any issues using the form, please email standards_enquiries@nationalhighways.co.uk