Each player controls 2-4 different lines, depending on the number of players.

Lines can also be interpreted as Track of different colours.

When placing Tracks on the board, players form their lines. The minimum lenght of a line is a single Track token.

Players can NEVER have more than 1 line of each color present on the board. Once a player starts their line, they may only extend it from either of its ends.

The end of a line is defined as a station with only one Track token of that line (colours) currently connected to it.

Players may spend 2 Branch tiles when placing Track tokens to extend their line from somewhere other than one of it ends. The Track token placed must still connect to the line.