Current
Civil & Structural Supplement
DMRB: Control and Communications Technology
Details the design requirements for ramp metering.
Control and communications technology. Design. Supersedes TD 121 Ramp metering (formerly IAN 103/08, IAN 121/09). (HE, 2020). Design manual for roads and bridges (DMRB) Version 0 - Jan 2020 - replaces IAN 103/08 and IAN 121/09. Version 0.0.1 - dated September 2024 - Changes made to core document, England NAA, and Northern Ireland NAA. Version 0.0.2 - dated October 2024 - Republication with no content change to correct index and version numbering.
National Highways is a government company, with responsibility for operating, maintaining and improving motorways and major A roads in England. It works with the Department for Transport and was previously known as Highways England and Highways Agency.
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