Our DR series of radars feature typical detection range of about 1200 to over 2000 feet (from about 1/4 mile or 400 meters to almost 1/2 mile or about 600 meters) depending on model type. This value is tested on an open level road with the radar mounted about 5 feet off the ground detecting a compact vehicle approaching at 85 Mph (except SS300 which is tested at about 50mph). The range will be longer with larger trucks. The range may be affected by installation effects like curves, dips, etc.
However, the range has always been found to be more than sufficient by all our customers for traffic awareness applications even with large 18″ digits.
Our SS400 radar features a 300+ feet (90+ meters) of detection range. It is designed for slower 25 Mph (40 Kph) roads (e.g., highway exits, road curves, school zones, traffic crossings, pedestrian and bicycle paths etc.) and not meant to replace the DR series of radars.