UPDATE: SEPTA said it would also cancel some trips Tuesday on the Airport, Fox Chase, and Chestnut Hill West lines.

SEPTA canceled trains on three of its Regional Rail lines during Monday morning's rush — and will do so again Monday afternoon — due to the ongoing safety inspections of its aging Silverliner IV fleet.

Six trains were canceled on the Airport, Fox Chase and Chestnut Hill West lines Monday morning in an effort to provide more reliable service throughout the Regional Rail system, SEPTA said in a statement Sunday night. Another 16 trains on those lines will be canceled later Monday. MORE: Parker says Market East plan is open to input. Residents, scarred by Sixers arena fight, aren't buying it.

SEPTA said riders can expect crowded stations, because it is operating "wit

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