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A commercial driver's license (CDL) is a driver's license required to operate large or heavy vehicles.

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.

The public idea of the trucking industry in the United States popular culture has gone through many transformations. However, images of the masculine side of trucking are a common theme throughout time. The 1940's first made truckers popular, with their songs and movies about truck drivers. Then in the 1950's they were depicted as heroes of the road, living a life of freedom on the open road. Trucking culture peaked in the 1970's as they were glorified as modern days cowboys, outlaws, and rebels. Since then the portrayal has come with a more negative connotation as we see in the 1990's. Unfortunately, the depiction of truck drivers went from such a positive depiction to that of troubled serial killers.

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.

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.

Without strong land use controls, buildings are too often built in town right along a bypass. This results with the conversion of it into an ordinary town road, resulting in the bypass becoming as congested as the local streets. On the contrary, a bypass is intended to avoid such local street congestion. Gas stations, shopping centers, along with various other businesses are often built alongside them. They are built in hopes of easing accessibility, while home are ideally avoided for noise reasons.

A relatable reality t.v. show to the industry is the show Ice Road Truckers, which premiered season 3 on the History Channel in 2009. The show documents the lives of truck drivers working the scary Dalton Highway in Alaska. Following drivers as they compete to see which one of them can haul the most loads before the end of the season. It'll grab you with its mechanical problems that so many have experienced and as you watch them avoid the pitfalls of dangerous and icy roads!

The basics of all trucks are not difficult, as they share common construction. They are generally made of chassis, a cab, an area for placing cargo or equipment, axles, suspension, road wheels, and engine and a drive train. Pneumatic, hydraulic, water, and electrical systems may also be present. Many also tow one or more trailers or semi-trailers, which also vary in multiple ways but are similar as well.

The Dwight D. Eisenhower National System of Interstate and Defense Highways is most commonly known as the Interstate Highway System, Interstate Freeway System, Interstate System, or simply the Interstate. It is a network of controlled-access highways that forms a part of the National Highway System of the United States. Named after President Dwight D. Eisenhower, who endorsed its formation, the idea was to have portable moving and storage. Construction was authorized by the Federal-Aid Highway Act of 1956. The original portion was completed 35 years later, although some urban routes were canceled and never built. The network has since been extended and, as of 2013, it had a total length of 47,856 miles (77,017 km), making it the world's second longest after China's. As of 2013, about one-quarter of all vehicle miles driven in the country use the Interstate system. In 2006, the cost of construction had been estimated at about $425 billion (equivalent to $511 billion in 2015).

In 1986 Stephen King released horror film "Maximum Overdrive", a campy kind of story. It is really about trucks that become animated due to radiation emanating from a passing comet. Oddly enough, the trucks force humans to pump their diesel fuel. Their leader is portrayed as resembling Spider-Man's antagonist Green Goblin.

In 1984 the animated TV series The Transformers told the story of a group of extraterrestrial humanoid robots. However, it just so happens that they disguise themselves as automobiles. Their leader of the Autobots clan, Optimus Prime, is depicted as an awesome semi-truck.

The decade of the 70's in the United States was a memorable one, especially for the notion of truck driving. This seemed to dramatically increase popularity among trucker culture. Throughout this era, and even in today's society, truck drivers are romanticized as modern-day cowboys and outlaws. These stereotypes were due to their use of Citizens Band (CB) radios to swap information with other drivers. Information regarding the locations of police officers and transportation authorities. The general public took an interest in the truckers 'way of life' as well. Both drivers and the public took interest in plaid shirts, trucker hats, CB radios, and CB slang.

Smoke and the Bandit was released in 1977, becoming the third-highest grossing movie. Following only behind Star Wars Episode IV and Close Encounter of the Third Kind, all three movies making an impact on popular culture. Conveniently, during that same year, CB Bears debuted as well. The Saturday morning cartoon features mystery-solving bears who communicate by CB radio. As the 1970's decade began to end and the 80's broke through, the trucking phenomenon had wade. With the rise of cellular phone technology, the CB radio was no longer popular with passenger vehicles, but, truck drivers still use it today.

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 tests essentially led to the 1964 recommendation by AASHTO to Congress. The recommendation determined the gross weight limit for trucks to be determined by a 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.

In today's society, there are rules and regulations everywhere you go, the same goes for commercial vehicles. The federal government has strict regulations that must be met, such as how many hours a driver may be on the clock. For example, 11 hours driving /14 hours on-duty followed by 10 hours off, with a max of 70 hours/8 days or 60 hours/7 days. They can also set rules deciding how much rest and sleep time is required, however, these are only a couple of regulations set. Any violations are often subject to harsh penalties. In some cases, there are instruments to track each driver's hours, which are becoming more necessary.

With the ending of World War I, several developments were made to enhance trucks. Such an example would be by putting pneumatic tires replaced the previously common full rubber versions. These advancements continued, including electric starters, power brakes, 4, 6, and 8 cylinder engines. Closed cabs and electric lighting followed. The modern semi-trailer truck also debuted. Additionally, touring car builders such as Ford and Renault entered the heavy truck market.

Known as a truck in the U.S., Canada, Australia, New Zealand, Puerto Rico, it is essentially a motor vehicle designed to transport cargo. Otherwise known as a lorry in the United Kingdom, Ireland, South Africa, and Indian Subcontinent. Trucks vary not only in their types, but also in size, power, and configuration, the smallest being mechanically like an automobile. Commercial trucks may be very large and powerful, configured to mount specialized equipment. These are necessary in the case of fire trucks, concrete mixers, and suction excavators etc.