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22 March 2018



Cestel showcases non-invasive WIM solution for bridges

First publishedIntertraffic
Daily News
Day 3
Cestel says its MkIII SiWIM technology turns any bridge into a fully automatic weigh-in-motion system without disturbing the road surface.

Sensors are fixed to the underside of the bridge deck beneath up to four lanes of traffic and the system is calibrated with vehicles of known weight passing individually, in opposite directions and in various combinations depending on the road layout. Having been calibrated, an algorithm then interprets the information to determine the number, weights, speed and direction of passing vehicles and the cumulative load on the bridge deck.

The system can be configured with or without cameras and is said to be easily relocated from one bridge to another (only requiring re-calibration).

Measured gross vehicle weights (above 3.5t) are said to be within 7%, individual axles within 11% and group axles within 10%. Speed measurement are within 2% and vehicles can be divided into an unlimited number of categories.

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