No more wood token, it's cardboard token.
This edition added 4 modules:
Expansion Module 1: Metro Companies - the stockholding expansion from Cable Car. Combinable with expansions 2 and 3, below)
Expansion Module 2: Metro Stations (one additional train car token in the eight colors to claim CENTRAL station lines as an optional action during play)[combinable with expansions 1 and 4],
Expansion Module 3: Central Tracks (8 tiles, 4 of which are chosen at a time, that remove/cover the central station with variable tracks so all train lines will terminate at edge of board)[combinable with expansions 1 and 4],
Expansion Module 4: Station Numbers (gives players an adjustable number of hidden objectives for extra points using 32 station-number tokens)[combinable with expansions 2 and 3].
Also, the cardboard player-color train car tokens have station terminations in the same color on the backs.
Similar to Streetcar, Tsuro, Tantrix and Spaghetti Junction, this game has players putting square tiles onto the board to form rail lines. The major difference in this game, however, is that players are not striving to make short, direct routes like those sought in Streetcar. Instead, the object of the game is to make the rail lines as long as possible. Players start with a number of trains ringing the board. Whenever a tile placement connects a train to a station (either on the edge or the center of the board), that train is removed and the player scores one point for each tile that the route crosses, which can cause one tile to score multiple times if the track loops around. However, players score double for city connections, which are the stations in the center of the board.
The game was originally issued as Iron Horse.