PHILADELPHIA (CBS) – SEPTA is warning riders to prepare for delays and crowded trains during Tuesday’s evening commute.

According to the transit company, all Regional Rail trains will continue to run on a Saturday schedule throughout rush hour.

SEPTA says managers will assess morning rider numbers and try to provide supplementary service on lines where it’s determined overcrowding could occur.

Riders are encouraged to visit the SEPTA website’s Alerts box on the homepage for information on specific trains.

SEPTA will return to normal weekday schedules on Wednesday.