MODIFIED CELL TRANSMISSION MODEL (CTM) FOR TRAFFIC FLOW SIMULATION
Cell Transmission Model (CTM) is one of the numerical methods used to determine the macroscopic dynamics of traffic flow. One of the conditions for applying the standard CTM method is that the road segments in the calculation domain must be partitioned into sub-intervals of the same length. The l...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/49536 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Cell Transmission Model (CTM) is one of the numerical methods used to determine
the macroscopic dynamics of traffic flow. One of the conditions for applying the
standard CTM method is that the road segments in the calculation domain must be
partitioned into sub-intervals of the same length. The length of the sub-interval is a
multiplication of the observation time unit with free flow velocity. Requirement of
the same length of this sub-interval can sometimes not be met for a specific actual
situation, for example if the road section is too short. Here, a modification of the
CTM is proposed in order to overcome this restriction. The modified CTM method
is formulated in this Final Project. The formula is expressed in terms of the variable
traffic density k and traffic current q . Furthermore, the modified CTM formula is
used to simulate traffic flow dynamics in a variety of situations, including; the
emergence of high traffic density which increases in length over time due to an
obstacles in front of it. The effect of a traffic light, and its modification when there
was a diverge, are also simulated. The results obtained here are consistent with
standard CTM results, and confirm our daily experience. |
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