Direct Enforcement: KiTraffic Digital from Kistler defines a new level for Weigh In Motion

Direct Enforcement: KiTraffic Digital from Kistler defines a new level for Weigh In Motion

Kistler Group (Switzerland) - Press Release: With KiTraffic Digital, measurement technology expert Kistler is bringing to market the most accurate Weigh In Motion system yet available. The new system promises an accuracy of up to two percent GVW – independent of almost all external factors, such as driving maneuvers or road conditions. In this way, Kistler has created the conditions for automatically imposing fines for overloaded vehicles.

Weigh In Motion technology is already being used for various purposes – for example, to protect bridges and roads or to collect data for statistics. Sensors in the road surface record the weight of vehicles while driving without impairing the flow of traffic. However, the technology has not so far been capable of capturing overloaded vehicles directly after weighing in the same way as we are used to with speed controls. In the vast majority of countries, ‘direct enforcement’ – i.e. automated recording of vehicle data with subsequent notification of charges – requires vehicles to be weighed using certified, static scales. The authorities also need to be able to rely on the measurement results if, for example, the road quality is sub-optimal or a vehicle drives diagonally across the sensor. At most measuring stations where fines are imposed for overloaded vehicles, Weigh In Motion technology is therefore primarily used for pre-selection. Officers are then subsequently required to verify the measurement result with the aid of a static weighbridge and can only then order the driver to pay a fine.

Multiple individually measuring sensors:

With KiTraffic Digital, the Swiss company Kistler has now succeeded in bringing a solution onto the market that significantly improves measurement accuracy and thus enables direct enforcement in accordance with legal requirements. The entirely new sensor incorporates multiple quartz crystals that independently deliver data via a digital interface. The digital measuring signal permits individual calibration of each quartz crystal and prevents signal interference on the transmission path. Working from the measurement signals, sophisticated algorithms calculate the wheel, axle and total weight of each vehicle. Thanks to open standard interfaces, the system can be easily integrated into third-party traffic monitoring systems.

The new digital system also enables other potential sources of error to be ignored. For example, the sensor delivers reliable results even when the vehicle being measured is about to overtake and is driving diagonally over the Weigh In Motion sensor arrangement. At the same time, monitoring can be carried out on any number of lanes. The sensors also provide information on whether a vehicle is equipped with single or dual tires and can draw conclusions about the condition of the tires. The new system automatically records this information without the need for additional hardware. On the contrary, KiTraffic Digital even eliminates the need for the previously necessary induction loops for vehicle detection.

KiTraffic Digital will be presented to the public for the first time in April next year at Intertraffic Amsterdam.


Picture 1 Caption:

With KiTraffic Digital, overloaded vehicles could soon be fined via direct enforcement.

Picture 2 Caption:

KiTraffic Digital enables the individual calibration of each quartz crystal, which significantly improves the accuracy of the sensor.

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KiTraffic Digital also features a graphical web-based user interface and can be easily integrated into higher level systems.

Picture 4 Caption:

Multiple quartz crystals inside the Lineas Digital sensor provide increased accuracy, even when the external conditions are sub-optimal.

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