Metrolink passengers connect from one line to another line at transfer stations. The three major Metrolink transfer stations are Los Angeles Union Station, San Bernardino, and Riverside-Downtown.
Sometimes, two or more Metrolink lines share the same track. This occurs four times in the system (see below).
|Los Angeles Union Station||San Bernardino||Riverside-Downtown|
|San Bernardino Line||San Bernardino Line|
|Riverside Line||Riverside Line|
|91 Line||91 Line|
|Inland Empire-Orange County Line||Inland Empire-Orange County Line|
|Antelope Valley Line|
|Ventura County Line/Burbank-Bob Hope Airport Line|
|Metro Red, Purple, and Gold Lines|