Thanks for all the imformation. I downloaded the light controller and the switcher asset, but I couldn't figure out how to connect all the splines. The light controller has a US and a UK setup, so it should work correctly with the USA region. I have other work on the route I am building so I will probably work on it more now. In the future when I have other things worked out I will probably come back to the traffic intersections again and try to figure it out more. Thanks again all......Mel