The trucking industry has made a large historical impact since the early 20th century. It has affected the U.S. bothpoliticallyas well aseconomicallysince the notion has begun.Previous to the invention of automobiles, most freightwas moved bytrain or horse-drawn carriage. Trucks were firstexclusivelyused by the military during World War I.
After the war, construction of paved roads increased. As a result, trucking began to achieve significant popularity by the 1930's.Soon after trucking became subject to various government regulation, such as the hours of service.During the later 1950's and 1960's, trucking accelerated due to the construction of the Interstate Highway System.The Interstate Highway System is an extensive network of freeways linking major cities cross country.
There are certain characteristics of a truck that makes it an "off-road truck". They generally standard, extra heavy-duty highway-legal trucks.Although legal, they have off-road features like front driving axle and special tires for applying it to tasks such as logging and construction.The purpose-built off-road vehiclesare unconstrained byweighing limits, such as theLibherrT 282B mining truck.
Medium trucks are larger than light but smaller than heavy trucks. In the US, theyare definedas weighing between 13,000 and 33,000 pounds (6,000 and 15,000 kg). For the UK and the EU, the weight is between 3.5 and 7.5 tons (3.9 and 8.3 tons).Local delivery and public service (dump trucks, garbage trucks, and fire-fighting trucks) are around this size.
The Federal Motor Carrier Safety Administration (FMCSA) is an agency within the United States Department of Transportation.The purpose of the FMCSA is to regulate safety within the trucking and moving industry in the United States.The FMCSA enforces safety precautions that reduce crashes, injuries, and fatalities involving large trucks and buses.
The American Association of State Highway and Transportation Officials (AASHTO) conducted a series of tests.These tests were extensive field tests of roads and bridges to assess damages to the pavement.In particular they wanted to know how traffic contributes to the deterioration of pavement materials. These testsessentiallyled to the 1964 recommendation by AASHTO to Congress.The recommendation determined the gross weight limit for trucks tobe determined bya bridge formula table. This includes table based on axle lengths, instead of a state upper limit. By the time 1970 came around, there were over 18 million truck on America's roads.