of the Texas Transportation Code grants the Texas Transportation Commission authority to prohibit the use of any part of a highway or road by any vehicle if it would make a bridge or culvert unsafe. The posting of weight limits (R12 Series) may be necessitated by new construction, deterioration of a roadway and/or bridge, or other conditions. Weights posted should be coordinated through the Texas Department of Transportation (TxDOT) Design Division (DES) and Bridge Division (BRG). It is also very important that the Texas Department of Motor Vehicles (TxDMV) be notified of weight limits so that they can operate efficiently and issue permits properly.

Route permits for oversize and overweight vehicles are issued by the TxDMV under of the Texas Transportation Code.