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Sub-problem 5a - Page 3 of 3 |
ID# C405A03 |
Sub-problem 5a: Network Simulation
Discussion
Probably the most significant lesson learned from Problem 5 is that it is
possible to develop a simulation model for the subarea network. We also
learned that it is possible to obtain interesting pieces of information
about the performance of the network to help planners and designers
understand where there are problems and what can be done about them.
The simulation model
is a diagnostic tool, not a solution generator. It can tell how a given
network configuration performs and let you compare and contrast one solution
with another. The model won’t tell where to add capacity or how much. These
need to be obtained through engineering judgment or trial and error. But you
have to develop the solution ideas.
Simulation models have
value. They can examine networks of highway facilities in a highly unified,
holistic fashion. Inter-dependencies and cascading effects can be taken into
account, as can traffic variations over time, over saturation, queue length
fluctuations, lane blockages, and other transient phenomena. Simulation
models add value when these issues are important and the interrelationships
among the facilities have to be captured.
