Trainz Railroad Simulator 2006, more commonly known as TRS2006, is a Microsoft Windows train simulation game developed by Auran. It is the 4th game in the series, succeeding Trainz Railroad Simulator 2004. The main modules are Surveyor, Driver, Railyard, and Trainz Exchange
    * 1 Gameplay
    * 2 Railyard
    * 3 Surveyor
    * 4 Creating Assets

TRS2006 can be played through either the DCC control type (simple) or Cab Mode (advanced). DCC control uses a model railway display for train driving, designed for beginners, or for running many trains at once. Cab mode uses a realistic driver control, using keyboard commands to move and stop the train or to go inside the train to drive first person.

Railyard is where the user can look at locomotives and rolling stock, hear the locomotive's horn/whistle, raise or lower the pantograph if the locomotive has one, and turn on/off the lights if there are any.

Surveyor is the route editor where the user can create and edit a route/layout/map.
Users can create their own content and install it into the game for their own use, or upload it to Auran's website, where the content can be downloaded by other users.