Hello,
I am working with the CACC model to determine how it impacts freeway
capacity. I studied in detail the algorithm for the CACC (
https://www.sciencedirect.com/science/article/pii/S0968090X14002447?via%3Dihub
 and
https://www.sciencedirect.com/science/article/pii/S0968090X1830528X?via%3Dihub).
In addition, I looked at the code at (
https://github.com/eclipse/sumo/blob/master/src/microsim/cfmodels/MSCFModel_CACC.cpp
).
However, I was not able to see how the time headway shown in two papers is
implemented in the code. I am particularly interested in decreasing this
parameter. I did try to work with "tau", however, it is still not clear how
"tau" is implemented in the CACC.

Interestingly, when I set "tau = 1" it gives me the maximum flow. Any value
greater (1.5, 2) or lower (0.1, 0.2, 0.3, 0.5) than 1 decreases the flow
rate per hour. Could you let me know how timeHeadway is implemented in the
CACC model and also what parameter should I change if I want lower time
headways (for example I want to have a time headway of 0.5 sec between
vehicles).
I have attached my files for reference.
Thank you in advance.

-- 
Thank you,
Soumya Sharma
Graduate Research Assistant | ITRE
PhD Civil Engineering | Transportation Systems | NC State
*AREMA **Liaison | NC State Student Chapter *
LinkedIn <https://www.linkedin.com/in/soumya-sharma-7580333b>

[image: itre.PNG]

Attachment: CACC.rar
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