A commercial driver's license (CDL) is a driver's license required to operate large or heavy vehicles.
Signage of business routes varies, depending on the type of route they are derived from. Business routes paralleling U.S. and state highways usually have exactly the same shield shapes and nearly the same overall appearance as the routes they parallel, with a rectangular plate reading "BUSINESS" placed above the shield (either supplementing or replacing the directional plate, depending on the preference of the road agency). In order to better identify and differentiate alternate routes from the routes they parallel, some states such as Maryland are beginning to use green shields for business routes off U.S. highways. In addition, Maryland uses a green shield for business routes off state highways with the word "BUSINESS" in place of "MARYLAND" is used for a state route.
In the United States, commercial truck classificationis fixed byeach vehicle's gross vehicle weight rating (GVWR). There are 8 commercial truck classes, ranging between 1 and 8.Trucks are also classified in a more broad way by the DOT's Federal Highway Administration (FHWA). The FHWA groups them together, determining classes 1-3 as light duty, 4-6 as medium duty, and 7-8 as heavy duty.The United States Environmental Protection Agency has its own separate system of emission classifications for commercial trucks.Similarly, the United States Census Bureau had assigned classifications of its own in its now-discontinued Vehicle Inventory and Use Survey (TIUS,formerlyknown as the Truck Inventory and Use Survey).
The American Association of State Highway and Transportation Officials (AASHTO) is an influential association as an advocate for transportation. Setting important standards, they are responsible for publishing specifications, test protocols, and guidelines. All whichare usedin highway design and construction throughout the United States. Despite its name, the association represents more thansolelyhighways. Alongside highways, they focus on air, rail, water, and public transportation as well.
In 1986 Stephen King released horror film "MaximumOverdrive", a campy kind of story.It isreallyabout trucks that become animated due to radiation emanating from a passing comet.Oddlyenough, the trucks force humans to pump their diesel fuel. Their leaderis portrayedas resembling Spider-Man's antagonist Green Goblin.
Driver's licensing has coincided throughout the European Unionin order tofor the complex rules to all member states.Driving a vehicle weighing more than 7.5 tons (16,535 lb) for commercial purposes requires a certain license. This specialist licence type varies depending on the use of the vehicle and number of seat.Licences first acquired after 1997, the weightwas reducedto 3,500 kilograms (7,716 lb), not including trailers.