About: Clocker (train)

The Clocker was a passenger train service between Philadelphia and New York City on the Northeast Corridor at first by the Pennsylvania Railroad and later by Amtrak. The service was nicknamed the Clocker by riders as trains were scheduled to leave each terminal at the top of the hour. The name was eventually adopted into official use by Amtrak in 1981. The service was briefly renamed Acela Commuter in 1999 before the name reverted to Clocker in 2003. Amtrak discontinued the service on October 28, 2005, and it was partially replaced by New Jersey Transit express trains between Trenton, NJ and New York City at times approximating the Clocker schedule.