Transport
The word transport describes the intentional movement of humans, animals, and goods from one location to another. This definition covers everything from a person walking across a field to a rocket launching into space. The field divides naturally into three categories: infrastructure, vehicles, and operations. Infrastructure refers to fixed installations like roads, railways, airways, waterways, canals, and pipelines. Vehicles include wagons, automobiles, bicycles, buses, trains, trucks, helicopters, watercraft, spacecraft, and aircraft. Operations encompass the rules, financing, legalities, and policies that govern how these systems function.
A mode of transport is a solution combining specific types of vehicles, infrastructure, and operations. Most journeys involve just one mode, but many require inter-modal or multi-modal transport. Each mode carries its own advantages and disadvantages based on cost, capability, and route. Governments regulate vehicle operation through procedures set for financing, legalities, and policy. Ownership structures vary widely, ranging from public government control to private enterprise or mixed partnerships. For example, privately owned cars coexist with government-owned urban transport in cities. Many international airlines operate under a mix of public-private ownership models.
Humans first moved by walking, running, and swimming before domesticating animals for heavier loads. The wheel and sled emerged as inventions making animal transport more efficient. Early road transport relied on horses domesticated in the 4th or 3rd millennium BCE and oxen used since about 8000 BCE. Water transport dates back to time immemorial with canoes cut from tree trunks or made of animal hides. These early vessels were rowed or sailed using wind power until the Industrial Revolution changed everything.
The Industrial Revolution in the 19th century introduced steam engines that freed land transport from human or animal muscles. Speed and capacity increased dramatically, allowing manufacturing to locate independently of natural resources. Steam ships sped up global transport while combustion engines and automobiles around 1900 made road transport competitive again. The Wright brothers demonstrated the first successful controllable airplane in 1903. After World War I aircraft became fast ways to transport people and express goods over long distances. Scientific spaceflight began in the 1950s with rapid growth until the 1970s when interest dwindled.
Containerization arrived in the 1950s giving massive efficiency gains in freight transport and fostering globalization. International air travel became much more accessible in the 1960s with commercial jet engine technology. Rail and water transport declined in relative importance as automobiles and motorways grew. The Shinkansen high-speed rail train launched in Japan in 1964, attracting passengers on long-haul routes away from airlines. In the U.S., private joint-stock corporations owned most infrastructure during the 19th century before government control took over in the late 19th and early 20th centuries.
Rail transport consists of wheeled vehicles running on tracks usually made of two parallel steel rails known as a railway or railroad. Rails anchor perpendicular to ties of timber, concrete, or steel to maintain consistent distance apart called gauge. The rails and beams rest on foundations of concrete or compressed earth and gravel in ballast beds. Alternative methods include monorail, maglev, and hyperloop systems. Dual gauge railways use three or four rails allowing trains with different track gauges to operate simultaneously.
A train comprises one or more connected vehicles operating on rails known as rolling stock. Propulsion commonly comes from locomotives hauling unpowered cars carrying passengers or freight. Locomotives power themselves through steam, diesel, gas turbine, or electricity supplied by trackside systems. Trams run shorter distances on rails integrated into streets while typically electric-powered but sometimes propelled by horses, cables, gravity, or pneumatics. Railed vehicles move with much less friction than rubber tires on paved roads making them more energy efficient though not as efficient as ships.
Roads serve as identifiable routes between places smoothed, paved, or prepared for easy travel. At least within the U.S., automobiles remain the most common road vehicle carrying their own motor. Other users include buses, trucks, motorcycles, bicycles, and pedestrians. As of 2015 there were 950 million passenger cars worldwide with projections reaching 2.5 billion by 2050. Road transport offers flexibility transferring vehicles between lanes and roads according to need and convenience. This combination of location changes, direction shifts, speed adjustments, and timing variations remains unavailable to other motorized modes.
Transport serves as a key necessity enabling specialization allowing production and consumption to occur at different locations. Throughout history better transport has spurred expansion creating more trade and spreading people further. Economic growth always depended on increasing capacity and rationality of transport networks. However infrastructure and operation impact land heavily while transport remains the largest drainer of energy globally. Modern cities create physical distinctions between home and work forcing people to transport themselves to workplaces, study sites, or leisure areas.
Passenger transport forms the essence of tourism which constitutes a major part of recreational transport. Commerce requires moving people to conduct business either through face-to-face communication for important decisions or relocating specialists from regular work sites. In lean thinking transporting materials or work in process from one location to another represents one of seven wastes that do not add value to products. Transport planning allows high use with less impact regarding new infrastructure using forecasting models to predict future patterns.
Containerization revolutionized international and domestic trade since the 1950s by standardizing ISO containers across all vehicles and ports. Traditional cargo required manual loading and unloading into ship or car hauls but containerization enables automated handling and transfer between modes. Standardized sizes allow gains in economy of scale during vehicle operations making this one of the key driving factors behind globalization. Bulk transport handles roughable cargo like ore, coal, cereals, and petroleum where mechanical handling moves enormous quantities quickly and efficiently.
Transport burns most of the world's petroleum creating air pollution including nitrous oxides and particulates. This makes it a significant contributor to global warming through carbon dioxide emissions representing the fastest-growing emission sector globally. The International Energy Agency reports transportation accounts for more than one-third of CO2 emissions worldwide in the early 2020s. Road transport remains the largest contributor to global warming among sub-sectors despite environmental regulations reducing individual vehicle emissions in developed countries.
Data shows barriers and motivators to sustainable transport behavior exist within UK Department for Transport studies. Environmentalists call for transitions from air and road to rail and human-powered transport alongside increased electrification and energy efficiency. Traffic congestion and automobile-oriented urban sprawl consume natural habitat and agricultural lands while producing acid rain and smog. Reducing transport emissions globally predicts significant positive effects on Earth's air quality and climate change outcomes.
Electric cars cut down CO2 emissions at point of use becoming popular among cities worldwide prioritizing public transport, bicycles, and pedestrian movement. Policies now levy congestion charges on cars traveling within congested areas during peak times. Airplane emissions vary depending on flight distance since takeoff and landing require lots of energy making longer flights more efficient per mile traveled though using more fuel total. Short flights produce the most emissions per passenger mile while long flights generate slightly less overall.
Energy levels involved in transport accidents pose significant risks for crew and passengers making safety a government priority. Significant accidents trigger reviews by law enforcement and independent investigators from safety boards like the NTSB in the U.S. Measures implement improvements across roads, automobiles, motorcycles, bicycles, railways, ships, and aircraft. Emergency medical services and sea rescue measures provide rapid response capabilities to transport emergencies.
Statistics gather from accidents then analyze results determining safety measures to lower casualty rates. Road traffic accidents rank as one of leading causes of death worldwide killing or injuring nearly 1.35 million people every year. Planning, design, maintenance, and operation facilities perform through transportation engineering aiming for safe, efficient, rapid, comfortable, convenient, economical, and environmentally compatible movement. The goal balances multiple competing priorities including speed against environmental compatibility and economic efficiency against human safety.
Government oversight regulates vehicle operations through procedures set for financing, legalities, and policies. Ownership structures range from public control to private enterprise or mixed partnerships depending on country and mode. International shipping remains highly competitive with little regulation though ports can be publicly owned. Safety regulations reduce individual vehicle emissions but offset increases in numbers of vehicles and usage per vehicle creating ongoing challenges.
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Common questions
What is the definition of transport?
Transport describes the intentional movement of humans, animals, and goods from one location to another. This definition covers everything from a person walking across a field to a rocket launching into space.
When did the Industrial Revolution change land transport?
The Industrial Revolution in the 19th century introduced steam engines that freed land transport from human or animal muscles. Speed and capacity increased dramatically, allowing manufacturing to locate independently of natural resources.
Who invented the first successful controllable airplane?
The Wright brothers demonstrated the first successful controllable airplane in 1903. After World War I aircraft became fast ways to transport people and express goods over long distances.
How many passenger cars existed worldwide as of 2015?
As of 2015 there were 950 million passenger cars worldwide with projections reaching 2.5 billion by 2050. Road transport offers flexibility transferring vehicles between lanes and roads according to need and convenience.
Why does road transport contribute most to global warming?
Road transport remains the largest contributor to global warming among sub-sectors despite environmental regulations reducing individual vehicle emissions in developed countries. Transport burns most of the world's petroleum creating air pollution including nitrous oxides and particulates.