Smart Enforcement of Transport Operations

Do you know what WIM technology is?


Today, for the “Do you know?” series, we discover what WIM technology is, thanks to DigInnoCent

Weighing-in-motion (WIM) is a technology used to measure the weight of vehicles as they are moving. Instead of requiring vehicles to stop at a stationary weigh station, WIM systems allow for the measurement of vehicle weights while they are in motion, hence the term “weighing-in-motion”.

Here is a breakdown of how WIM works:

  • Dynamic Tyre Forces: When a vehicle moves over a WIM system, sensors or devices in the road surface detect the forces exerted by the vehicle’s tires as they roll over the sensors. These forces vary depending on the weight of the vehicle and the distribution of that weight across its tires.
  • Gross Vehicle Weight (GVW) Estimation: By analyzing the data from these sensors, the WIM system can estimate the total weight of the vehicle, including its cargo and passengers. This total weight is referred to as the Gross Vehicle Weight (GVW). Essentially, the system calculates how much weight is being supported by the road surface as the vehicle passes over it.
  • Static Wheel/Axle Loads: Additionally, WIM systems can provide information about the distribution of weight across the vehicle’s wheels and axles. This helps determine if any individual wheels or axles are bearing an excessive amount of weight, which could indicate potential safety or compliance issues.

In summary, WIM technology allows authorities to monitor and enforce weight limits for vehicles without requiring them to stop at a weigh station. By measuring the forces exerted by moving vehicles, WIM systems provide valuable data for ensuring road safety, protecting infrastructure, and enforcing regulations related to vehicle weight.

SETO applies WIM technology to enforce overloading regulations in a more efficient manner.

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