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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 ...
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If no bridge is located on the route, the worst section of road governs the route's classification. Vehicles having higher load classifications than a particular route are sometimes able to use that route if a recon overlay or a special recon [ clarification needed ] shows that a change in traffic control , such as making a bridge a single-flow ...
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In 1964 the Highway Research Board recommended to congress that weight limits be set based on a bridge formula table. Not until 1974 was the limit raised to 80,000 lb in conjunction with the federal bridge formula limits. I will incorporate this info into the article. --ErgoSum88 19:45, 3 May 2008 (UTC)
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A weigh bridge in a hump classification type of yard. A rail weighbridge [4] is used to weigh rollingstock including railroad cars, railroad cars, goods wagons and locomotives, empty or loaded. When loaded, the net weight of the cargo is the gross weight less the tare weight when known. It is also used to weigh trams.