This is a map expansion for Ticket to Ride. You will need neither Ticket to Ride or Ticket to Ride Europe to use this map.
As in Ticket to Ride players collect train cards in order to claim routes between pairs of cities with the overall goal of completing tickets. However this map twists the gameplay in two ways. First, nearly every route on the game board is a double-route, with two tracks connecting cities. Both of these routes are in play no matter how many players are in the game.
Second, every route — whether double or single — has a bridge toll that a player must pay when building on that route. On a single route or the first track of a double route, the player pays this toll — which costs 1-4 coins — to the bank; on the second track of a double route, the player pays this toll to the player who built the first track. Players start the game with 30 coins, and if you can't pay a toll, you must take a loan card to cover the fare, with each loan costing you 5 points at the end of the game.
This all means that you really need to balance finishing off those routes and what coins and cards you hold!