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The Federal-Aid Highway Act Amendments of 1974 established the bridge formula as law, along with the gross weight limit of 80,000 pounds (36,000 kg). Current applications of the formula allow for up to 7 axles and 86 feet or more length between axle sets, and a maximum load of 105,500 lbs. [2]
The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed ...
National Bridge Inventory. The National Bridge Inventory (NBI) is a database, compiled by the Federal Highway Administration, with information on all bridges and tunnels in the United States that have roads passing above or below them. That is similar to the grade-crossing identifier number database, compiled by the Federal Railroad ...
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 ...
Regulatory signs. Regulatory signs give instructions to motorists, pedestrians, and cyclists. Signs including Stop, Yield, No Turns, No Trucks, No Parking, No Stopping, Minimum Speed, Right Turn Only, Do Not Enter, Weight Limit, and Speed Limit are considered regulatory signs.
The Federal-Aid Highway Amendments of 1974 was signed into law by President of the United States Gerald Ford on January 4, 1975. [1] 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 ...
The bridge was designed before the start of the Interstate Highway System, and it was grandfathered into the system. [8] Interstate 93 super two through Franconia Notch, New Hampshire. Interstate 93 through Franconia Notch, New Hampshire is also a notable exception, being a super two parkway with a speed limit of 45 mph (72 km/h).
According to this FHWA report the first weight limits were enacted by a few states in 1914, however, federal weight limits were set in 1956 at 73,280 lbs. In 1964 the Highway Research Board recommended to congress that weight limits be set based on a bridge formula table.