As I have mentioned at that post:
The maximum speed and maximum acceleration for each car is randomly selected in the simulation, so the number of cars passing the juntcton is not the same even with all the same parameters.
Please write down what is the problem you are working on and what is the purpose of your work.
May be there are better way to do it.
I did check out the simulation.
It is a nice simulation. I think it was designed for other purpose : what are the factors which will cause the traffic jam.