Gridlock Buster challenges you to manage the flow of traffic in a gridlocked city in the not-too-distant future. Commissioned by the University of Minnesota. Instructions: Click on an intersection to change the traffic signal. In later levels you will use a signal programmer to control the timing of multiple signals. If cars are forced to wait for too long, your frustration meter will fill up and you'll lose. Get higher scores by making cars wait for as little as possible. Try to earn a gold medal on each level!