The Susquehanna Regional Transportation Authority, (formerly Central Pennsylvania Transportation Authority (formerly York Adams Transportation Authority)), doing business as rabbittransit, is the mass transit service of York and Adams counties in Pennsylvania and oversees the transportation needs of Columbia, Cumberland, Franklin, Montour, Northumberland, Perry, Snyder and Union counties.

The agency currently operates 15 fixed routes within York County (12 in York and 3 in Hanover) and 4 routes in Adams County (all of which serve Gettysburg), express bus routes from Gettysburg to Harrisburg and from York to Harrisburg and Towson, Maryland (connecting to the Baltimore Light RailLink of the Baltimore area's Maryland Transit Administration).

[1] rabbittransit was formerly known as York County Transit Authority.

The name was changed in 2000 in order to improve the agency's image.

On December 22, 2020, it was announced that rabbittransit would merge with Capital Area Transit (CAT), which offers service in Dauphin and Cumberland counties, to form the Susquehanna Regional Transportation Authority.