Traffic simulator on the net

It is a mini version of Java congestion simulator. Various types of roads can be chosen, and how many cars will you run, and how much will the percentage of trucks be? If you change the parameters such as border with the mouse, it will be reflected in real time. I understand as to what opportunity triggers heavy traffic jam .... Also, you can see how traffic jams are resolving.
Microsimulation of road traffic
http://vwisb7.vkw.tu-dresden.de/~treiber/MicroApplet/

It seems that there is something like this if it is similar.

Simulation Viewing
http://www.cs.utexas.edu/~kdresner/2004aamas/index.html

With this theory, if you add ETC to all cars, traffic jams near the tollgate will not be solved, but it will be relaxed ... ....