If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Keep the flow of traffic moving, switching traffic lights and stopping cars from crashing into trains and each other. The town now has a railroad and traffic is worse than ever. Your expert help is needed to bring easy riding to the streets once again. Click on broken down cars to remove them, click on lights or use your number keys to switch the lights and keep cars from crashing!