The Quadropolis: Public Services expansion, which debuts in Europe in April 2017 and in North America in June 2017 and retails for $15/€13, consists of 24 public service building tiles, four helpers, and rules. Here's how those buildings come into play:
Each round, a selection of public service tiles are revealed and placed face up next to the board. Players will then be able to build these in their city, with each of these new buildings offering in-game bonuses and scoring options to newly challenge you as Mayor of a modern city.
Just as Ticket to Ride was succeeded by Ticket to Ride: Europe, Ticket to Ride: First Journey has now been succeeded by, um, Ticket to Ride: First Journey, with the only difference being that (1) players are completing tickets that connect cities in Europe and (2) eleven editions will be released with rules in roughly fifteen languages. Here's an explanation of the gameplay:
In general, players collect train cards, claim routes on the map, and try to connect the cities shown on their tickets. In more detail, the game board shows a map of Europe with certain cities being connect by colored paths. Each player starts with four colored train cards in hand and two tickets; each ticket shows two cities, and you're trying to connect those two cities with a contiguous path of your trains in order to complete the ticket.
On a turn, you either draw two train cards from the deck or discard train cards to claim a route between two cities; for this latter option, you must discard cards matching the color and number of spaces on that route (e.g., two yellow cards for a yellow route that's two spaces long). If you connect the two cities shown on a ticket with a path of your trains, reveal the ticket, place it face up in front of you, then draw a new ticket. (If you can't connect cities on either ticket because the paths are blocked, you can take your entire turn to discard those tickets and draw two new ones.) If you connect one of the westernmost cities (Dublin, Brest, Madrid) to one of the easternmost cities (Moscow, Rostov, Ankara) with a path of your turns, you immediately claim a special cross-continent ticket.
The first player to complete six tickets wins! Alternatively, if someone has placed all twenty of their trains on the game board, then whoever has completed the most tickets wins!