Weigh-in-Motion is a technique to measure the axle loads of moving trucks. Apart from axle loads WIM-systems also measure the speed, the type and the gross vehicle weight of all passing trucks. By comparing the measurement results from a WIM-system with the limits for axle loads and gross weight overloading can be determined. Overloading is unwanted because of a number of reasons, for road maintenance the extra damage to the road infrastructure is most important. Overloaded (axles of) trucks are responsible for a disproportional large part of the damage to the road surface. The possible applications of Weigh-in-Motion are: Enforcement of overloading, Exploitation of toll roads and traffic management.

ARCADIS provides the following services in the field of the operational application of WIM:

• Consulting of enforcement agencies on the possible applications of WIM-systems for the enforcement of overloading. The organisation of the operational processes so that the data collected by the WIM-systems are used best. It also consists of the consulting on legal, institutional and operational implementation within the enforcement agency;
• Advise on the design of WIM-systems for a specific application. This consists of the choice of the technology to be used, the choice of the best location to build the system and the lay out of the sensor array;
• Storage of data measured by WIM-systems. The stored data can be used to monitor if the performance of the system is still within specifications. The data can also be used to calculate the extra damage caused by overloading en the related costs for the extra maintenance;
• The protection of (toll-) roads or other vulnerable infrastructures against overloaded (axles of) trucks.