Speed cameras that shame drivers rather than fine them are set to be introduced nationwide following a successful trial on the M42.
Instead of receiving a speeding ticket, motorists could see their numberplate displayed on roadside screens, along with the words "slow down".
The M42 test was carried out earlier this summer by highways consultant company Atkins.
Drivers were urged to slow down as they approached roadworks between junctions 9 and 10, where the speed limit was 50 mph.
If they failed to do so, their number plate was displayed for all to see.
Now the Highways Agency is considering extending the experiment to other English motorways and major routes.
There were more than 700 accidents at roadworks in the UK in 2004, 12 of them fatal.
Atkins director Richard Deacon said: "All road workers are at risk from speeding drivers and we are committed to reducing this danger.
"This innovative system, which brings together two well-established technologies, provides a targeted approach that has proved most effective in encouraging drivers to adhere to the speed limit in roadworks.
"We believe this system has an important role to play in reducing the appalling number of casualties in roadworks. It also has great potential to be used to encourage drivers to reduce speeds in other hazardous areas on our roads."
A Highways Agency spokesman said: "We support this initiative and we are taking stock to decide how we can proceed further.
"Drivers should be assured that the number plate information is not kept once it has been flashed up on the screens."
The signs are portable, and can be easily between sites such as roadworks.
They show the reduced speed limit when they are not displaying licence plate numbers.
Meanwhile, road safety campaigners called for the removal of all speed cameras, claiming they cause accidents.
Safe Speed said it has uncovered research commissioned by the Highways Agency which found fixed speed cameras were associated with a 55 per cent increase in crashes at road works.
