They tend to be used on smart motorways when the speed limit is lowered to ease congestion or in the event of poor weather or some other hazard. "The speed cameras are situated on the overhead ...

They are linked to video cameras which monitor the Advanced Motorway Indicator (AMI) displays mounted on the overhead gantries. The system can read what speed limit is being displayed and adjust the ...

Though they’re designed to make driving a safer, quicker and more enjoyable affair, smart motorways have become ... Dictated by overhead dot matrix signs, the system is designed to control ...

Smart motorway technology identifies stopped vehicles and closes lanes using overhead signs ... Radar devices and cameras were still being tested between junctions 33 and 34, meaning traffic ...