As we've learned the Federal-Aid Highway Act of 1956 was crucial in the construction of the Interstate Highway System. Described as an interconnected network of the controlled-access freeway. It also allowed larger trucks to travel at higher speeds through rural and urban areas alike.This act was also the first to allow the first federal largest gross vehicle weight limits for trucks, set at 73,208 pounds (33,207 kg). The very same year, Malcolm McLean pioneered modern containerized intermodal shipping. This allowed for the more efficient transfer of cargo between truck, train, and ships.
A trailer is not very difficult to categorize. In general, it is an unpowered vehicle towed by a powered vehicle. Trailers are most commonly used for the transport of goods and materials. Although some do enjoy recreational usage of trailers as well.
According to the U.S. Census Bureau, 40 million United States citizens have moved annually over the last decade. Of those people who have moved in the United States, 84.5% of them have moved within their own state, 12.5% have moved to another state, and 2.3% have moved to another country.
Trailer stability can be defined as the tendency of a trailer to dissipate side-to-side motion. The initial motion may be caused by aerodynamic forces, such as from a cross wind or a passing vehicle. One common criterion for stability is the center of mass location with respect to the wheels, which can usually be detected by tongue weight. If the center of mass of the trailer is behind its wheels, therefore having a negative tongue weight, the trailer will likely be unstable. Another parameter which is less commonly a factor is the trailer moment of inertia. Even if the center of mass is forward of the wheels, a trailer with a long load, and thus large moment of inertia, may be unstable.
As of January 1, 2000, the Federal Motor Carrier Safety Administration (FMCSA)was establishedas its own separate administration within the U.S. Department of Transportation. This came about under the "Motor Carrier Safety Improvement Act of 1999".The FMCSAis basedin Washington, D.C., employing more than 1,000 people throughout all 50 States, including in the District of Columbia.Their staff dedicates themselves to the improvement of safety among commercial motor vehicles (CMV) and to saving lives.
Tracing the origins of particular words can be quite different with so many words in the English Dictionary.Some say the word "truck" might have come from a back-formation of "truckle", meaning "small wheel" or "pulley". In turn, both sources emanate from the Greektrokhos(τροχός), meaning "wheel", fromtrekhein(τρέχειν, "to run").