Choice Of Transportation Engineering Modes
Still another
consideration too often neglected in evaluating the effects of highways and
other transportation facilities. This is
that some effects are long run and others are short run. For example, some of
the strongest complaints against highways are related to noise and air
pollution from today'? motor vehicles. Some of the worst effects are already
being controlled by strict enforcement of noise and air pollution regulations
and by installing noise barriers. Furthermore, research may well produce
engines and tire-pavement combinations that are far less noisy; likewise,
modifications to today's engines or new means of propulsion are already
substantially reduce air pollution. Thus it could be argued that sensible
long-term investments to develop effective transport engineering based on rubber rolling on
pavement could be blocked by short-run effects that may largely disappear in
the near future.
When choices
among investments in alternative transportation modes are at issue, especially
in large urban areas, a variety of factors omitted from or not particularly
emphasized. One relates to
capital-intensive, long-term alternatives such as heavy or light rail, people
movers, or freeways versus short-term ones including buses or other conveyances
traveling primarily on existing highways. Another is the relative availability
of funds for the various modes, particularly in the form of federal or other
appropriations or grants. Furthermore, certain alternatives may provide greater
short- or longer-term employment. For example, buses are short-lived and might
be manufactured locally and their operation is labor-intensive. On the other
hand, rail, once constructed, has long-lived trains which might be made elsewhere
and which need relatively few operators
There
are also land use concerns that influence the choice between transportation modes. One is a combination of policies designed to rehabilitate rundown areas
and fill in vacant spaces in cities, preserve open space and agricultural land
adjacent to them, and reduce energy consumption. This question is discussed in
more detail later.
Title Post: Choice Of Transportation Engineering Modes
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Author: aditya
Rating: 100% based on 99998 ratings. 5 user reviews.
Author: aditya
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