The John W. Olver Transit Center, also called the JWO Transit Center, is an intermodal transit hub for Franklin County, Massachusetts. Located in Greenfield, it currently serves Franklin Regional Transit Authority (FRTA) local bus routes plus intercity bus service. Amtrak's Greenfield station is also located here, with one daily Vermonter round trip and two daily Valley Flyer round trips, which are extensions of Amtrak-run Hartford Line trains.

The Valley Flyer is a train service run by Amtrak between New Haven, Connecticut and Greenfield, Massachusetts along Amtrak's New Haven–Springfield Line and the Massachusetts Department of Transportation's Connecticut River Line.