you try to control the traffic lights so that as many cars as possible can pass from one side of the screen to the other. It is a map of a square city and the roads have 16 crosses with 16 traffic lights. Different colors of cars are passing the city form every entrance the map. Traffic lights can be changed by clicking on the junctions. Every time a car passes across the city you score 1 point. As your score increases the amount of cars entering the city will increase. The amount of cars queuing outside the city is shown in the queue score box. If 5 or more cars are queuing then it?s game over.