The Design Manual for Roads and Bridges (DMRB) is a suite of documents which contains requirements and advice relating to works on motorway and all-purpose trunk roads for which Transport Scotland as Overseeing Organisation is the road authority.
The DMRB embodies the collective experience of the Overseeing Organisations, their agents, supply chain members and industry bodies. It provides requirements and advice resulting from research, practical experience of constructing and operating motorway and all-purpose trunk roads, and from delivering compliance to legislative requirements.
The DMRB has been prepared for use by competent practitioners, typically qualified professionals able to work independently in relevant fields, who are expected to apply their own skill and judgement when making decisions involving the information that the DMRB contains.
The Design Manual for Roads and Bridges
The Design Manual for Roads and Bridges sets a standard of good practice that has been developed principally for the trunk road and motorway network. It may also be applicable in part to other roads with similar characteristics. Where it is used for local road schemes, it is for the local roads authority to decide on the extent to which the documents in the manual are appropriate in any particular situation.
In addition to the DMRB, the following documents remain applicable to trunk roads projects in Scotland:
- TD 37/93 Scheme Assessment Reporting
- TA 46/97 Traffic Flow Ranges for Use in the Assessment of New Rural Roads
- TA 79/99 Traffic Capacity of Urban Roads [Incorporating Amendment No.1 dated May 1999]
These documents are available on request from Transport Scotland. These documents are also available on the archive of DMRB standards.
Link with Manual of Contract Documents for Highway Works
The requirements and advice given in DMRB documents are provided on the basis that the works are constructed in accordance with the Manual of Contract Documents for Highway Works (MCHW).
The MCHW is a standard suite of specification documents which are included within a construction contract.
Within the DMRB, Transport Scotland publications Cycling by Design and Roads for All: Good Practice Guide for Roads are referenced and set out guidance which is used in the design of the trunk road and motorway network.