The intention of a trailer coupler is to secure the trailer to the towing vehicle. It is an important piece, as the trailer couple attaches to the trailer ball. This then forms a ball and socket connection. It allows for relative movement between the towing vehicle and trailer while towing over uneven road surfaces. The trailer ball should be mounted to the rear bumper or to a drawbar, which may be removable. The drawbar secures to the trailer hitch by inserting it into the hitch receiver and pinning it.
The three most common types of couplers used are straight couplers, A-frame couplers, and adjustable couplers. Another option is bumper-pull hitches in which case draw bars can exert a large amount of leverage on the tow vehicle. This makes it harder to recover from a swerving situation (thus it may not be the safest choice depending on your trip).
“The association of truckers with cowboys and related myths was perhaps most obvious during the urban-cowboy craze of the late 1970s, a period that saw middle-class urbanites wearing cowboy clothing and patronizing simulated cowboy nightclubs. During this time, at least four truck driver movies appeared, CB radio became popular, and truck drivers were prominently featured in all forms of popular media.” — Lawrence J. Ouellet
"Six Day on the Road" was a trucker hit released in 1963 by country music singer Dave Dudley. Bill Malone is an author as well as a music historian. He notes the song "effectively captured both the boredom and the excitement, as well as the swaggering masculinity that often accompanied long distance trucking."
The American Trucking Associations initiated in 1985 with the intent to improve the industry's image. With public opinion declining the association tried numerous moves. One such move was changing the name of the "National Truck Rodeo" to the "National Driving Championship". This was due to the fact that the word rodeo seemed to imply recklessness and reckless driving.
A business route (occasionally city route) in the United States and Canada is a short special route connected to a parent numbered highway at its beginning, then routed through the central business district of a nearby city or town, and finally reconnecting with the same parent numbered highway again at its end.
In some states, a business route is designated by adding the letter "B" after the number instead of placing a "Business" sign above it. For example, Arkansas signs US business route 71 as "US 71B". On some route shields and road signs, the word "business" is shortened to just "BUS". This abbreviation is rare and usually avoided to prevent confusion with bus routes.
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.
The United States' Interstate Highway System is full of bypasses and loops with the designation of a three-digit number. Usually beginning with an even digit, it is important to note that this pattern is highly inconsistent. For example, in Des Moines, Iowa the genuine bypass is the main route. More specifically, it is Interstate 35 and Interstate 80, with the loop into downtown Des Moines being Interstate 235. As it is illustrated in this example, they do not always consistently begin with an even number. However, the 'correct' designation is exemplified in Omaha, Nebraska. In Omaha, Interstate 480 traverses the downtown area, which is bypassed by Interstate 80, Interstate 680, and Interstate 95. Interstate 95 then in turn goes through Philadelphia, Pennsylvania. Furthermore, Interstate 295 is the bypass around Philadelphia, which leads into New Jersey. Although this can all be rather confusing, it is most important to understand the Interstate Highway System and the role bypasses play.
In the United States, commercial truck classification is fixed by each 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, formerly known as the Truck Inventory and Use Survey).
The FMCSA is a well-known division of the United States Department of Transportation (USDOT). It is generally responsible for the enforcement of FMCSA regulations. The driver of a CMV must keep a record of working hours via a log book. This record must reflect the total number of hours spent driving and resting, as well as the time at which the change of duty status occurred. In place of a log book, a motor carrier may choose to keep track of their hours using an electronic on-board recorder (EOBR). This automatically records the amount of time spent driving the vehicle.
The Federal Bridge Gross Weight Formula is a mathematical formula used in the United States to determine the appropriate gross weight for a long distance moving vehicle, based on the axle number and spacing. Enforced by the Department of Transportation upon long-haul truck drivers, it is used as a means of preventing heavy vehicles from damaging roads and bridges. This is especially in particular to the total weight of a loaded truck, whether being used for commercial moving services or for long distance moving services in general.
According to the Federal Bridge Gross Weight Formula, the total weight of a loaded truck (tractor and trailer, 5-axle rig) cannot exceed 80,000 lbs in the United States. Under ordinary circumstances, long-haul equipment trucks will weight about 15,000 kg (33,069 lbs). This leaves about 20,000 kg (44,092 lbs) of freight capacity. Likewise, a load is limited to the space available in the trailer, normally with dimensions of 48 ft (14.63 m) or 53 ft (16.15 m) long, 2.6 m (102.4 in) wide, 2.7 m (8 ft 10.3 in) high and 13 ft 6 in or 4.11 m high.
The term "lorry" has an ambiguous origin, but it is likely that its roots were in the rail transport industry. This is where the word is known to have been used in 1838 to refer to a type of truck (a freight car as in British usage) specifically a large flat wagon. It may derive from the verb lurry, which means to pull or tug, of uncertain origin. It's expanded meaning was much more exciting as "self-propelled vehicle for carrying goods", and has been in usage since 1911. Previously, unbeknownst to most, the word "lorry" was used for a fashion of big horse-drawn goods wagon.
A circumferential route refers to a public transportation system that follows the route in the shape of a circle. Over time a nickname developed in the European Union, calling transportation networks such as these a "ring road". This is no surprise as Europe has several famous "ring roads" such as the Berliner Ring, the Brussels Ring, the Amsterdam Ring, the Boulevard Périphérique around Paris and the Leeds Inner and Outer ring roads. Other countries adopted the term as well which in turn made the name go international. Australia's Melbourne's Western Ring Road and India's Hyderabad's Outer Ring Road both adopted the name. However in Canada, the term is most commonly used, with "orbital" used to a much lesser extent.
On the contrary, the United States calls many "ring roads" as belt-lines, beltways, or loops instead. For example, the Capital Beltway around Washington, D.C. Some ring roads use terminology such as "Inner Loop" and "Outer Loop". This is, of course, for the sake of directional sense, since compass directions cannot be determined around the entire loop.
The 1950's were quite different than the years to come. They were more likely to be considered "Knights of the Road", if you will, for helping stranded travelers. In these times truck drivers were envied and were viewed as an opposition to the book "The Organization Man". Bestseller in 1956, author William H. Whyte's novel describes "the man in the gray flannel suit", who sat in an office every day. He's describing a typical office style job that is very structured with managers watching over everyone. Truck drivers represented the opposite of all these concepts. Popular trucking songs glorified the life of drivers as independent "wanderers". Yet, there were attempts to bring back the factory style efficiency, such as using tachnographs. Although most attempts resulted in little success. Drivers routinely sabotaged and discovered new ways to falsify the machine's records.
The rise of technological development gave rise to the modern trucking industry. There a few factors supporting this spike in the industry such as the advent of the gas-powered internal combustion engine. Improvement in transmissions is yet another source, just like the move away from chain drives to gear drives. And of course the development of the tractor/semi-trailer combination.
The first state weight limits for trucks were determined and put in place in 1913. Only four states limited truck weights, from a low of 18,000 pounds (8,200 kg) in Maine to a high of 28,000 pounds (13,000 kg) in Massachusetts. The intention of these laws was to protect the earth and gravel-surfaced roads. In this case, particular damages due to the iron and solid rubber wheels of early trucks. By 1914 there were almost 100,000 trucks on America's roads. As a result of solid tires, poor rural roads, and a maximum speed of 15 miles per hour (24km/h) continued to limit the use of these trucks to mostly urban areas.
The most basic purpose of a trailer jack is to lift the trailer to a height that allows the trailer to hitch or unhitch to and from the towing vehicle. Trailer jacks may also be used for the leveling of the trailer during storage. To list a few common types of trailer jacks are A-frame jacks, swivel jacks, and drop-leg jacks. Other trailers, such as horse trailers, have a built-in jack at the tongue for this purpose.
Some trailers can be towed by an accessible pickup truck or van, which generally need no special permit beyond a regular license. Such examples would be enclosed toy trailers and motorcycle trailers. Specialized trailers like an open-air motorcycle trailer and bicycle trailers are accessible. Some trailers are much more accessible to small automobiles, as are some simple trailers pulled by a drawbar and riding on a single set of axles. Other trailers also have a variety, such as a utility trailer, travel trailers or campers, etc. to allow for varying sizes of tow vehicles.
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.
