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The Federal Bridge Gross Weight Formula, also known as Bridge Formula B or the Federal Bridge Formula, is a mathematical formula in use in the United States by truck drivers and Department of Transportation (DOT) officials to determine the appropriate maximum gross weight for a commercial motor vehicle (CMV) based on axle number and spacing ...
Among other changes, the law permanently implemented a national 55-mph speed limit (which had already been a temporary limit) for the Interstate Highway System. It also established the Federal Bridge Gross Weight Formula as law, which governed the weight-to-length ratio of trucks in order to protect highway bridges and infrastructure.
The Federal-Aid Highway Amendments of 1974 established a federal maximum gross vehicle weight of 80,000 pounds (36,000 kg), and introduced a sliding scale of truck weight-to-length ratios based on the bridge formula, but did not establish a federal minimum weight limit.
The federal gross weight limit for a Class 8 truck is 80,000 pounds (36,000 kg) (combined weight of truck, trailer, and cargo) with axle weights limited to 12,000 pounds (5,400 kg) (steering axle) and 34,000 pounds (15,000 kg) (tandem axles).
Some of the prose reads almost exactly like the sources, unsourced statements, factually inaccuracies on my cursory check against the sources ("The first truck weight limits were enacted by four states in 1914"; "As many as 150 bridges collapse each year, and most of those are the result of soil erosion around bridge supports."
Jan. 16—The aging Latah Bridge has new weight restrictions and is barred to some large vehicles, including garbage trucks, aerial fire trucks and other specialized trucks exceeding 22 tons after ...
When asked what type of vehicles the weight limit affects, WSDOT spokesperson Cara Mitchell wrote in an email to The News Tribune Aug. 12 that it depends on the total weight of the vehicle plus ...
Aug. 3—FLOYD COUNTY — Multiple traffic changes are occurring in Floyd County, including a five-day closure on U.S. 150 and new load restrictions on the Blackiston Mill Road bridge. The Floyd ...