The Road Traffic Offenders (Prescribed Devices) Order (Northern Ireland) 1997
This Order prescribes, for the purposes of Article 23 of the Road Traffic Offenders (Northern Ireland) Order 1996, three types of speed detection devices and one device which records the position of vehicles in relation to light signals by photograph or similar means. The three speed detection devices are—a device for measuring the speed of a motor vehicle by radar;a device activated by a vehicle passing through light beams; anda device activated by a vehicle passing over sensors or cables on the road.