Mainline

Mainline was a rumored operator for Westwood Metro. However, MattCamelly has denied this. He says "The game is called Westwood metro because it is a metro based game. Mainline is for decoration and to add to the scenery."

Even though mainline doesn't exist, Matt says that in a future update to add to the scenery, it will be extended further starting at the only current mainline station, Westwood Central and will then call at East Hampton and then Westwood Coast.