In order to have easy mobility of persons
and goods, it is necessary to have a
sophisticated and widespread transportation system. This system is made up of five primary areas of
transportation, which are:
· Motor
vehicles
· Railroad
transportation
· Air
transportation
· Water
transportation
· Pipelines
Each of these
five modes consists of different subsystems which make up the system. Each mode is used to transport persons or
goods, but in many instances, one mode may be favored over the others. All five modes require some primary source of
funds for building and maintaining the infrastructure. These funds may come from a number of
different places
such as the federal government, state, or the city through
which the system runs. Different
government agencies have jurisdiction over the modes. These agencies focus on maintaining and
improving safety of each system. The
individual states also have certain obligations to the operation and regulation
of the different modes of transportation.
Each mode is made up of primary
subsystems. The subsystems of railroad
transportation include freight trains and passenger trains. Freight trains are used to transport goods and
materials between cities while passenger trains are used to transport
people. Although freight trains are
still used all across the nation, rail intercity freight has accounted for a
decreasing share of the total ton mileage over the past 30 years. This is mostly due to the increase in truck
transport. Rail passenger traffic had
also declined over the years until better service was offered by Amtrak and the
price of fuel increased. Much of the
decline in rail passenger traffic has been due to the increasing number of air
passengers.
Air transport can also be divided into the
subsystems of passenger and freight transport.
Passenger air travel has rapidly increased over the years due to:
· Increasing
Gross National Product
· Increasing
wealth of the middle-income groups
· Increasing
number of nonprimary industry in the economic system
· Increasing
amount of general aviation
· Improved
technology
The areas for air
transport of express and freight and mail has also increased rapidly over the
years. This is due mostly to improved
technology which has steadily lowered the cost of air transport.
Like rail and air transport, water
transportation can also be broken down to passenger and freight transport. Passenger transportation by water only
accounts for a very small percentage of water transport because it is very slow
and relatively inconvenient for most people.
This is primarily used by people for vacation purposes. Most often, water transport is used for
freight movement of items that are bulky and of low cost per unit volume.
Pipelines can be divided into two
principle classes including oil and natural gas pipelines. Oil pipelines are used to transport oil and
oil-products. Gas pipelines differ from
oil pipelines in that they are not in competition with other carriers.
Each mode is used to convey certain goods
or materials. Highways are most often
used to carry motor vehicles. These
vehicles may be privately owned, company owned, or even state owned. They may range in size from single passenger
vehicles such as motorcycles to large freight vehicles such as triple-trailer
trucks. The transport of freight may
include anything from raw materials to finished products.
Railroads are used to carry freight and
passenger trains. In both cases, the
number of railroad cars may vary between destinations. However, it would not be practical to haul a
single car for a long distance , therefore, many cars are usually hauled on
each trip.
Passenger trains
are designed to haul passengers, while freight trains are designed to haul
materials ranging from raw goods to finished products.
Air transport is used in the
transportation of passengers and freight.
Aircraft used to transport passengers come in many different sizes. They range from small single passenger aircraft
to large jumbo jet aircraft.
Transportation of freight is another area of air transport. Most common is the express and freight and
mail carriers. Most of this material is
carried by local passenger/cargo carriers.
Some military aircraft is used in the transportation of much larger
freight. The materials transported by
air may include anything from raw materials to finished products.
Another mode of transporting passengers
and freight is by water. The
transportation of passengers is slow and inconvenient, therefore it is not used
very often except for pleasure. The size
of water craft may vary from small single seater jet skis to large cruise
ships. The most common use of water
transportation is for freight. The type
of freight moved is usually limited to those classes that are bulky and of low
cost per unit volume.
Pipelines are mainly used to transport oil
and oil products or natural gas. Oil
pipelines are divided between gathering lines and trunk lines, while gas
pipelines are divided between field lines and trunk lines.
Each mode must have sufficient funds for
building and maintaining the infrastructure.
For the highway system, funds come from several different areas. The United States highway system is publicly
owned, therefore much of the funds are received
from the federal government, however, most of the funds are received
from highway user taxes. Federal highway
funds are available for construction and improvement of the federal primary
system. The state is responsible for the
upkeep of most primary and secondary roads.
State highway systems may overlap federal systems. The funds for most state primary systems come
from the state, while local and county authorities are responsible for
secondary systems. Local and other
systems usually receive funds from the local authorities for maintenance,
improvement, and construction. Toll
roads receive funds for upkeep by charging people a small fee to travel on the
highway.
Railroad systems are usually privately
owned. Most railroad systems are built
and maintained by the company, but funds are also provided by the federal
government.
The air transportation system obtains much
of its funds from federal aid if the facility is owned by local governments (in
most cases they are). The airlines
themselves are also responsible for much of the funds required to maintain the
facility. Small general aviation
aircraft are usually privately owned and used for recreational purposes, or
owned by businesses which do a large amount of traveling. These facilities are usually paid for by the
local area and the users of the airport.
The construction, maintenance, and
operation of waterways is paid for by the federal government since the United
States Coast Guard assumes responsibility for the supply and operation of
navigational aids. While the federal
government pays for the waterways, most of the vessels are company or privately
owned, with the exception of U.S. Coast Guard vessels. Improvement to ports is usually is usually
funded by state or city aid or from borrowing.
The pipeline transportation system is the
only mode of transportation that gets no direct aid from the federal
government. Most of the funds required
to construct and maintain the pipelines comes from the company which owns the
pipeline.
Different government agencies from the
U.S. Department of Transportation have primary jurisdiction over each mode of
transportation. The Federal Highway
Administration (FHWA) provides funds to states for highway construction,
improving, and management. FWHA also
provides funds for several state-administered safety programs. The National Highway Traffic Safety
Administration (NHTSA) focuses on
maintaining and improving safety of motor vehicles and equipment and conducts
test programs to evaluate and guarantee compliance with the standards. The Federal Railroad Administration (FRA)
develops and administers programs to achieve safe operating practices in the
industry. Primary jurisdiction of
airways is controlled by the Federal Aviation Administration (FAA). The FAA issues and enforces air safety
regulations, develops and operates the airways, and inspects and certifies
aircraft. The United States Coast Guard
enforces federal laws regarding navigation, port safety and security,
inspection of vessels, and protection of the marine environment. All construction and safety standards are
enforced by the U.S. Coast Guard.
Pipeline transportation is controlled by the Federal Energy Regulatory
Commission of the Department of Energy.
Many transportation organizations exist at
the state level. Each state has certain
roles in the operation and regulation of the different modes. States must follow the regulations set by the
federal government, but each state can also make its own set of regulations. An example of this would be the N.C. seatbelt
law.
The United States transportation system is
made up of several different modes of transportation. Each of these modes are operated and
regulated to different degrees by federal, state, and local governments. All of these modes of transportation give a
great deal of mobility for the people and goods and materials of each
state.
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