Low-Speed WIM

Appointment LS-WIM

In some cases it becomes necessary to control the weight of vehicles as accurately as possible. In order to increase the efficiency of control through partially automated weighing, the concept of Low Speed WIM (Low Speed WIM) was developed and implemented.

LS-WIM consists of the use of wheel or axle scales mainly equipped with load cells – the most precise technology – and installed on concrete or solid asphalt platforms at least 30 to 40 meters long.

The data acquisition and processing system software is designed to analyze the load cell signal with regard to speed and to calculate the exact wheel or axle loads. Such systems are installed either outside lanes, at weighing sites, toll plazas, or in any other controlled area.

Operating speeds are typically in the 5 to 15 km/h range. The LS-WIM concept was first introduced in the UK, as well as several states in North America and provinces in Canada and Australia. European countries (Germany, France, Belgium, etc.) and Japan have joined it after recognizing the effectiveness of this approach.

Typical LS-WIM specifications:

The name of the characteristic The value of the characteristic
Lane length 37m
Weighing technologies Strain gauges
Max load on axle 30-40t
Accuracy 1% (verification) 2% (operation) at a speed of 10-20 km/hour
Scale value 10-20 kg
Protection class IP68
Operating temperatures -40 - +80


Weighing module
Video fixation module
ANPR cameras Plates recognition, violations detecting
Viewing cameras Video fixation of weighing process
Traffic control module
Traffic lights Traffic control near the weighing area
VMS scoreboard Information about the need to weigh; Information about the weighing process
Communication module System controller, PC

Software part

WAGA-Х Generation of weighing data, violation logging, system control
WAGA dispatcher workstation, central data storage and processing
Implemented projects