Common Problems for Transport SystemsThere are four major types of problems that affect transport systems:
Capacity. A basic constraint concerns appropriate capacity,
both along a transport route and at a terminal. The capacity of
a transport system is often restricted by its circulation bottlenecks.
Transfer. Transfer points are crucial as they permit
the interface between different transport systems, a role commonly
served by hubs or gateways. For instance, a port is commonly the
interface between maritime and inland systems of circulation
while an airport can act as a hub connecting different air
networks such as regional and international.
Reliability. A multidimensional problem that concern
the expectation that a movement will occur within a specific time
and cost range. While a route could be shorter, it may not be as
reliable as a longer route. Congestion is a common factor impairing
the reliability of a transport system since it can impose
inconsistent time delays and additional costs.
Integration. Involves exploiting the benefits of each transport
mode so that flows become more reliable and/or less costly.
Intefgration is sought by intermodal transportation, but also by airline
companies connecting different parts of the world.
