Pacific Surfliner service will be suspended for three weekends in October due to scheduled track closures.
There will be no train service between Los Angeles and San Diego on October 8-9, 15-16 and 22-23.
All COASTER train services between Oceanside and San Diego will also be suspended during the track closures.
Metrolink will offer limited weekend service between Norwalk/Santa Fe Springs and Irvine.
Buses will be available with limited stops between L.A. and San Diego, but only as a dedicated connection to long-distance Amtrak trains. Connection tickets are required for Sunset Limited (train 2), Southwest Chief (train 3 or 4) and Coast Starlight (trains 11 or 14).
Bus service between Fullerton, Palm Springs and Indio (4968, 4969, 4984 and 4985) will be cancelled.
The track closures come as construction crews work along the track corridor between the two destinations.