Routes are a mechanic in TrP which allows players driving trolleybuses to choose which stops they would like to arrive at, and collect driver points/passengers for doing so.
Destination Boards

One way drivers can select routes is by placing 3 destination boards on the ZiU-682 and placing 4 destination boards on the ZiU-6205 and ZiU-682 EMU.
You can get destination boards by placing a Destination Board Container inside your trolleybus and using it
Electronic Destination Board
Owners of the Electronic Destination Boards gamepass with the modification enabled can set routes through the Announcer
List of Routes
Below is a list of routes you can find in TrP by default, however some Self hosted servers might use F3X to create their own Routes.