This simulates automobile traffic (3 cars) being controlled by traffic lights (the type that we have here in the U.S.) at different intersections. Lasers in front of the cars do all of the sensing for automatically controlling the cars and for changing traffic lights.
The three cars are color coded, Blue, Red, and Green. You can leave the scene run automatically, or you can alter the traffic by starting and stopping any of the cars by clicking on the colored boxes.
The traffic lights do a pretty good job of preventing collisions at intersections, but of course if you are too aggressive with the Start and Stop controls, you can cause crashes.
There is a fork in the road on the left side of the map which alternates between Left Turn and Straight. This gives the traffic some variation.
This is not a game. It's just something for you to play with when you are bored.
UPDATE: . . . Added a purple Police Car which is autonomous (that means it operates by itself, and you cannot control it. Of course you can "cheat" by grabbing it with the Move or Grab tools, but that's no Phun!).
UPDATE: . . . Improved traffic control at intersections, and made cars go slightly faster (if they go too fast, they crash!).
this is so nice! Thanks a lot. One can use it also for creating own road-system, with the nice cars working on the "wire-roads". 
