There are a number of YouTube Videos that will help you get to grips with TRANSYT. At least one of these covers the basics of setting up a a simple network and running it. Others cover more specific features of the product such as how to model priority junctions, and how to optimise for arterial routes within networks.
Some of the videos are recordings of our series of Webinars. To find out when our next ones are please go to www.trlsoftware.com