The aim of this game is to control the traffic lights so that as many cars as possible can pass from one side of the screen to the other. 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 scorebox. If 5 or more cars are queuing outside the city then its game over! . Best Traffic Control games.