The actions are performed one by one, in the order in which they are listed in these rules (and on the action board). The first player to perform an action is always the one whose action stone is furthest to the left. For line expansion and new buildings this will be the last player who has chosen the action. For Vrrooomm... and new passengers it is the first. This will automatically be apparent if the action stones have been put in the right spots.

Line Expansion Buying a Bus New Passengers New Buildings The Clock VRROOOMM! Starting Player 15 left 4 left

A player has to perform all the actions he or she has chosen as far as possible. If an action can only be performed partially, it must be completed to the maximum extent possible. It is not allowed to skip actions, or part of actions.