Control the flow of traffic so that cars don't run into each other. Using less signs to control traffic earns you more points, so try to keep the cars under control using as few signs as possible.

To change the direction of traffic from an intersection, click on a sign and then click a button to set the direction that cars go after hitting this intersection. You can use the arrow keys or WASD to move the camera as well.

Using less signs earns you more points, so try to control traffic as efficiently as possible.