Transportation Systems and the Environment
Transportation systems, by their inherent characteristics
have an impact on the environment.
- Network. Influences the spatial distribution
of emissions. Centralized networks concentrate the traffic and emissions
at specific locations (hubs), but are using less energy since
the average distance is shorter. Dispersed
networks may be perceived at the local scale as more environmental
friendly since they tend to be less intensively used, but are consuming much more energy.
- Mode. Related to the nature of emissions. For
instance, different transport modes have different energy requirements
and levels of efficiency. A car-dependent transport system has different
environmental problems than a transport system leaning on public
- Traffic. Induces the level of emissions and energy consumption
since it is related to the utilization level of a transport system
as well as the point source of emissions.