Acela Express
When the "Acela Express" was introduced in 1999, Amtrak launched what it called the Capstone Program, a short-lived plan to re-brand the "NortheastDirect", "Keystone Service" and "Empire Service" trains as "Acela Regional" and the "Clocker" trains as "Acela Commuter". Following mass rider confusion between this service and the high-speed Acela Express service, the name reverted to "Clocker" in 2003.