HADECS = Highways Agency Digital Enforcement Camera System
HADECS 3 camera systems are Home Office Type Approved for use on UK motorways. They are used in conjunction with variable and national speed limits and operate using radar technology (for speed detection) along with a system of cameras for image detection.
HADECS 3 uses radar for the detection of speed offences in all weather conditions, with lane identification, vehicle position and positive vehicle identification.
A pole-mounted External Aspect Verification (EAV) system located in advance of the Advanced Motorway Indicators (AMI) monitor changes to the speed limit displayed and alerts the camera system to set new enforcing speed limit thresholds accordingly.
The cameras work alongside variable speed limit signs on a motorway gantry or, if applicable, the national speed limit. The radar measures how fast a vehicle is travelling. If it is driving above the limit the camera system is triggered and two photographs are taken of the vehicle.
A secondary check is performed, this calculation is automated and the procedure is completed by a trained Police operative.
If you have any queries relating to the speed limit at the time of the alleged offence, please contact Highways England on 0300 123 5000 or by email: info@highwaysengland.co.uk.
