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Federal Bridge Gross Weight Formula
The Federal Bridge Gross Weight Formula, also known as Bridge Formula B or the Federal Bridge Formula, is a mathematical formula in use in the United States by truck drivers and Department of Transportation (DOT) officials to determine the appropriate maximum gross weight for a commercial motor vehicle (CMV) based on axle number and spacing. The formula is part of federal weight and size regulations regarding interstate commercial traffic (intrastate traffic is subject to state limits). The formula is necessary to prevent heavy vehicles from damaging roads and bridges. CMVs are most often tractor-trailers or buses, but the formula is of most interest to truck drivers due to the heavy loads their vehicles often carry. Early 20th-century weight limits were enacted to protect dirt and gravel roads from damage caused by the solid wheels of heavy trucks. As time passed, truck weight limits focused primarily on gross weight limits (which had no prescribed limits on length). By 1974, b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Formula 2
A bridge is a structure built to Span (engineering), span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones. The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge (dating from the 13th century BC, in the Peloponnese) is one of the oldest arch bridges still in existence and use. Etymology The ''Oxford English Dictionary'' traces ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Association Of State Highway And Transportation Officials
The American Association of State Highway and Transportation Officials (AASHTO) is a standards setting body which publishes specifications, test quality control, protocols, and guidelines that are used in highway design and construction throughout the United States. Despite its name, the association represents not only highways but air, rail, water, and public transportation as well. Although AASHTO sets transportation standards and policy for the United States as a whole, AASHTO is not an agency of the federal government; rather it is an organization of the states themselves. Policies of AASHTO are not federal laws or policies, but rather are ways to coordinate state laws and policies in the field of transportation. Purpose The American Association of State Highway Officials (AASHO) was founded on December 12, 1914. Its name was changed to American Association of State Highway and Transportation Officials on November 13, 1973. The name change reflects a broadened scope to co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dump Truck
A dump truck, known also as a dumping truck, dump trailer, dumper trailer, dump lorry or dumper lorry or a dumper for short, is used for transporting materials (such as dirt, gravel, or demolition waste) for construction as well as coal. A typical dump truck is equipped with an open-box bed, which is hinged at the rear and equipped with hydraulic rams to lift the front, allowing the material in the bed to be deposited ("dumped") on the ground behind the truck at the site of delivery. In the UK, Australia, South Africa and India the term applies to off-road construction plants only and the road vehicle is known as a tip lorry, tipper lorry (UK, India), tipper truck, tip truck, tip trailer or tipper trailer or simply a tipper (Australia, New Zealand, South Africa). History The dump truck is thought to have been first conceived in the farms of late 19th century western Europe. Thornycroft developed a steam dust-cart in 1896 with a tipper mechanism. The first motorized dump truck ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Formula Table
A bridge is a structure built to span a physical obstacle (such as a body of water, valley, road, or rail) without blocking the way underneath. It is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored, and the material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones. The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge (dating from the 13th century BC, in the Peloponnese) is one of the oldest arch bridges still in existence and use. Etymology The ''Oxford English Dictionary'' traces the origin of the wo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rand McNally
Rand McNally is an American technology and publishing company that provides mapping, software and hardware for consumer electronics, commercial transportation and education markets. The company is headquartered in Chicago, with a distribution center in Richmond, Kentucky. History Early history In 1856, William H. Rand opened a printing shop in Chicago and two years later hired a newly arrived Irish immigrant, Andrew McNally, to work in his shop. The shop did big business with the forerunner of the ''Chicago Tribune'', and in 1859 Rand and McNally were hired to run the ''Tribune''s entire printing operation. In 1868, the two men, along with Rand's nephew George Amos Poole, established Rand McNally & Co. and bought the Tribune's printing business. The company initially focused on printing tickets and timetables for Chicago's booming railroad industry, and the following year supplemented that business by publishing complete railroad guides. In 1870, the company expanded into ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
State Highways
A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either ''numbered'' or ''maintained'' by a sub-national state or province. A road numbered by a state or province falls below numbered national highways (Canada being a notable exception to this rule) in the hierarchy (route numbers are used to aid navigation, and may or may not indicate ownership or maintenance). Roads maintained by a state or province include both nationally numbered highways and un-numbered state highways. Depending on the state, "state highway" may be used for one meaning and "state road" or "state route" for the other. In some countries such as New Zealand, the word "state" is used in its sense of a sovereign state or country. By this meaning a state highway is a road maintained and numbered by the national government rather than local authorities. Countries Australia Australia's State Route system covers u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Network
The National Network (or National Truck Network) is a network of approved state highways and interstates for commercial truck drivers in the United States. The Surface Transportation Assistance Act of 1982 authorized the establishment of a national network of highways designated for use by large trucks. On these highways, Federal width and length limits apply. The National Network (NN) includes almost all of the Interstate Highway System and other, specified non-Interstate highways. The network comprises more than of highways. Definition §658.9 National Network Criteria The National Network listed in the appendix to this part is available for use by commercial motor vehicles of the dimensions and configurations described in §658.13 and §658.15. For those States with detailed lists of individual routes in the appendix, the routes have been designated on the basis of their general adherence to the following criteria. * The route is a geometrically typical component of the F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trucking Industry In The United States
The trucking industry serves the American economy by transporting large quantities of raw materials, works in process, and finished goods over land—typically from manufacturing plants to retail distribution centers. Trucks are also used in the construction industry, two of which require dump trucks and portable concrete mixers to move the large amounts of rocks, dirt, concrete, and other building materials used in construction. Trucks in America are responsible for the majority of freight movement over land and are tools in the manufacturing, transportation, and warehousing industries. Driving large trucks and buses require a commercial driver's license (CDL) to operate. Obtaining a CDL requires extra education and training dealing with the special knowledge requirements and handling characteristics of such a large vehicle. Drivers of commercial motor vehicles (CMVs) must adhere to the hours of service, which are regulations governing the driving hours of commercial drivers. D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Motor Carrier Safety Administration
The Federal Motor Carrier Safety Administration (FMCSA) is an agency in the United States Department of Transportation that regulates the trucking industry in the United States. The primary mission of the FMCSA is to reduce crashes, injuries and fatalities involving large trucks and buses. History The agency was established as a separate administration within U.S. Department of Transportation on January 1, 2000, pursuant to the "Motor Carrier Safety Improvement Act of 1999." FMCSA is headquartered in Washington, D.C. and employs more than 1,000 people in all 50 States and the District of Columbia, with the goal of making "roadways safer for the public and the CMV industry". Main functions In carrying out its safety mandate to reduce crashes, injuries, and fatalities involving large trucks and buses, FMCSA: * Develops and enforces data-driven regulations that balance motor carrier (truck and bus companies) safety with efficiency; * Harnesses safety information s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Montana Department Of Transportation
The Montana Department of Transportation (MDT) is a governmental agency in the U.S. state of Montana, responsible for numerous programs related to the construction, maintenance, and monitoring of Montana's transportation infrastructure and operations. While most of MDT's programs relate to the state's highway network, Montana's railroads and airports are also under the agency's purview. Responsibilities The responsibilities of the department include: *Designing and constructing roads and bridges *Maintaining roads, bridges, and rest areas *Collecting and enforcing fuel taxes *Enforcing safety, size, and weight laws for commercial vehicles *Managing the state motor pool *Designing and testing materials *Acquiring property *Enforcing Outdoor Advertising Control Act *Planning public transport and rail programs *Planning general aviation airports *Performing air search and rescue *Performing snow removal on roads History In March 1913, a state Highway Commission was created by the le ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bridge Collapse
This is a list of bridge failures. Before 1800 1800–1899 1900–1949 1950–1999 2000–present Bridge disasters in fiction *Harry Potter and the Half-Blood Prince (2005 novel): the fictional Brockdale Bridge, by the Death Eaters (replaced by the real-world Millennium Bridge, London in the 2009 film) *Final Destination 5 (2011 film) * The Bridge over the River Kwai (1952 novel) and its 1957 film adaptation The Bridge on the River Kwai *The Bridge of San Luis Rey (1927 novel) *Ring of Fire (1961 film) *The Cassandra Crossing (1976 film) *The Good, the Bad, and the Ugly (1966 film): bridge intentionally destroyed by Blondie and Tuco *The General (1926 film) * Train Man (1999 novel): featuring destruction of rail bridges over the Mississippi River * X-Men: The Last Stand (2006 film): The Golden Gate Bridge is rerouted by mutants to create a path to Alcatraz Island * Monsters vs. Aliens (2009 film): The Golden Gate Bridge is destroyed by a giant robot but Ginormica sav ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Concrete Pumper Truck, Denver
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined. Globally, the ready-mix concrete industry, the largest segment of the concrete market, is projected to exceed $600 billion in revenue by 2025. This widespread use results in a number of environmental impacts. Most notably, the production process for cement produces large volumes of greenhouse gas emissions, leading to net 8% of global emissions. Other environmental concerns include widespread illegal sand mining, impacts on the surrounding environment such as increased surface runoff or urban heat island effect, and potential public health implications from toxic ingredients. Significant research and development is be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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