If you download some Multiplayer sessions and their routes from the DLS, you should see some that are active. UMR-2013-SUMMER (latest version - don;t know what it is ATM) runs constantly, but you'll need to go to the Team Speak 3 server to get the password.
Montana Rail Link is another frequent runner.
If you just download the sessions, it will download the route that goes with it.
Hope this helps.
Kieran.