The cameras, which calculate the average speed along a length of road, will be installed between the Spittals Interchange (junction 23) and the Girton Interchange (J31).
Work starts on Monday and will take 12 weeks. The installation will take place overnight Monday to Thursday between 8pm and 6am, Fridays 9pm to 9am and Saturdays 7pm and 11am. During the work there will be overnight single lane closures and a temporary 40mph speed limit. There will also be some overnight carriageway and sliproad closures.
Steve Davy, Highways Agency A14 route performance manager, said: ‘We hope that this new camera system will help to make the A14 safer. The number of road casualties on the A14 in Cambridgeshire, although below the national average, is unacceptably high.’
Analysis of crashes and information from the police show the major factors involved in incidents on the A14 include motorists driving too fast and too close for the conditions as well as people using their mobile phones on the move and not wearing seatbelts.