keep SPECIFIED ROADS
These regulations implement variable speed limits on the M40 motorway northbound between Junction 16 and M42 Junction 3A. They require drivers to comply with speed limits displayed on variable speed limit signs (diagram 670), with enforcement based on the speed shown when passing the sign or 10 seconds prior, whichever is higher. The regulations reference the 1982 Motorways Traffic Regulations and 2002 Traffic Signs Regulations for definitions.
Variable speed limits on high-speed motorway sections serve legitimate safety and flow management purposes. Without this regulation, drivers could ignore variable speed limits designed to respond to congestion, accidents, or adverse conditions—putting lives at risk and increasing congestion that harms all road users. The targeted scope (one motorway section, northbound) demonstrates proportionality, and the 10-second lookback prevents opportunistic gaming of sign transitions. Deletion would remove a safety mechanism that prevents excess speeds during dangerous conditions, making Britons worse off through increased accident risk and reduced traffic flow efficiency.