The first phase of work to bring in closed circuit television cameras at three of the busiest junctions on the A14 in Cambridgeshire, will start on Monday.
The new cameras are being set up on the A14
Preparation work is being carried out in readiness for safety cameras to be installed later this year at the Brampton Hut Interchange with the A1, Spittals Interchange at Huntingdon and the Girton Interchange near Cambridge.
The safety cameras will allow the Highways Agency and the Police to monitor incidents and congestion at these locations and help them to provide an effective response to clear delays more quickly.
Neil Doherty, Highways Agency Project Manager, said: "The A14 trunk road between the A1 and the M11 is an important link in the
region's road network and has the highest traffic flows on the whole of the A14.
"The safety cameras will greatly assist the Highways Agency and the police with the day to day management of the road and will improve response times to any incidents that occur."
Work will be carried out overnight Monday to Friday between 2000 and 0600 GMT.
There may be some occasional weekend work and lane closures.
The second phase of work will install additional cameras and enable the system to operate in full by the end of the summer.