WIM (Weigh in Motion) technology is used to monitor and record the gross vehicle weight of commercial vehicles. In the past, drivers were required to pull off the highway into a weight station often waiting in line to be measured and weighed thus delaying shipments. Through a combination of sensors and cameras WIM’s complete the task while the vehicle is in operation. Weighing trucks in route allows carriers, who meet weight limit regulations, to forego scales, saving time and avoiding delays.

How it works

WIM uses a series of embedded sensors to calculate the weight per axle as trucks drive over the sensor pads. Unlike older existing methods, there is no need for the truck to come to a complete stop while on the scales. WIM systems can monitor traffic at highway speeds. WIM is a method that is gaining momentum.

It’s Better to be Seen not Weighed

Virtual weigh stations have several, time-saving, safety related, and research applications. They can be used to monitor pavement wear and inform bridge design. Law enforcement can use it to target offenders and hold them accountable. Legislators can use the research to develop highway maintenance and expansion plans, and administrators can use the information to help with coding regulations.

It Helps us All

Using the modern technology available to save time for carriers pays off for everyone. Time is money and especially in the trucking industry where one minute saved multiplied by the more than 2 million tractor-trailers on our American highways becomes substantial. Cost saving efficient methods of monitoring regulations are ultimately passed on to consumers. If you’d like to learn more about WIM and virtual weigh stations, I recommend this report from the FHWA (Federal Highway Administration)

Photo by Magnus / CC BY-SA