what is the purpose of weigh scales on the interstate/highways
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Commercial drivers have strict regulations that they need to follow to operate . It’s not just a matter of weight, but the weight has to be appropriately distributed between each axle. The wheel assemblies on trailers are specially designed so that they can slide forward or back, giving a balance between safe weight distribution for hauling or a better position for maneuvering in tight city spaces
Additionally, drivers are ultimately responsible for inspecting their vehicles for safety issues and keeping a log of their working hours. These logs and additionally safety inspections were checked at the weigh stations as well using a random method. This is part of why you see some drivers keeping their trucks cleaner than others–a clean truck is a sign of a well maintained truck, and there’s less chance of them having to submit to a random inspection.
Add: Some states also use them as environmental inspections for agricultural pests, prevent invasive water species on watercraft, or other invasive terrors like the spotted lanternfly.
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