A record number of speeding fines accrued on sections of motorway with variable speed limits could suggest the limits are confusing motorists.
An investigation by The Times showed that more than 70,000 drivers were fined on motorways with variable speed limits last year. This tenfold increase compared with five years ago has led to suggestions that variable speed limits are unfairly operated.
Highways England, which operates the country’s motorway network, pre-emptively enforces lowered speed limits before congestion builds up. But a spokesman for the AA told Autocar that such a system is creating “distrust” and encourages speeding.
“It’s not surprising that drivers who see the ‘congestion ahead’ message but are the only car on the motorway don’t trust the lowered speed limit,” said the spokesman. “It’s because they’re unaware of how the system works. But, in their defence, how would they know?”
The UK’s smart motorway system uses radar technology so it can detect traffic levels on the road. If traffic builds up at a certain section, the system slows down approaching cars so that by the time they reach the point, it’s cleared or at least freer-moving.
But the AA has asked Highways England to provide more information as to how quickly the system can react to changes because, as the spokesman explained, “there could be a delay that leaves lowered limits in place” even after congestion has cleared.
“Let’s have a review in the radar system,” the spokesman said. “Is there a time lag, has it been left on for an hour after that congestion has ended? We argue that if traffic is now free, let it flow.”