Low Speed Weigh In Motion systems are installed in a controlled environment such as a vehicle weight enforcement and inspection stations where the vehicle speed is controlled to approximately 5 kph. Accuracies to +/-1% are achievable providing the axle weigh bridge is installed in a concrete weigh lane constructed to TDC specifications. Automatic vehicle classification allows for immediate indication of vehicle overload dependent upon vehicle class and legal local weight limits.

TDC offer two bespoke Low Speed Weigh In Motion solutions; the LO-TRAC 100 and the LO-TRAC 200. The LO-TRAC 100 model includes interconnectivity to other systems (e.g. HSWIM systems) and includes functions to control traffic lights, entry barriers, etc, whereas the LO-TRAC 200 model has limited connectivity but stills functions as a weight enforcement system.

The TDC axle weighbridge; model WB30L, connects to either the 100 or 200 models, it is set in a pit frame which is itself set in the concrete weigh lane. The axle weighbridge utilizes four 10,000kg load cells and is structurally strong enough to withstand axle loads of up to 70,000 kg.