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- CTM is a discrete approximation of hydrodynamic model.
System evolution is based on difference equations.
- Unlike hydrodynamic model, it explains the phenomenon of Instability.
- Lesser the time per clock tick lesser are the size of cells and more
accurate results would be obtained.
But a compromise is needed between accuracy and computational effort.
Largest possible cell size which would sufficiently give the details needed
must be chosen.
- CTM has many applications in DTA, NDP, traffic operations, emergency
evacuations etc.
- There is a vast scope for improvement and applications of this model.
- CTM is consistent with hydrodynamic theory, which is a widely used model
for studying macroscopic behavior of the traffic.
- It is simple and sufficiently accurate for planning purposes.
- CTM can be used to provide "real time" information to the drivers.
- CTM has been used in developing a system optimal signal optimization
formulation.
- CTM based Dynamic Traffic Assignment have shown good results.
- CTM has its application in Network Design Problems.(NDP)
- CTM is for a "typical vehicle" in network traffic, work is needed for the
multi-modal representation of traffic.
- Cell length cannot be varied.
For this the methods like Modified Cell Transmission Model is to be used.
- CTM is largely deterministic, stochastic variables are needed to be
introduced to represent the random human behavior.
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