Worcester Regional Transit Authority (WRTA) is a public, non-profit organization charged with providing public transportation to the city of Worcester, Massachusetts and the surrounding towns. The WRTA was created in September 1974 under Chapter 161B of the Massachusetts General Laws. This act also created several other regional transit authorities in Massachusetts, including the Greater Attleboro-Taunton Regional Transit Authority and the Pioneer Valley Transit Authority among others; in terms of ridership, the WRTA is the second largest regional transit authority and third largest transit system in Massachusetts.

The Pioneer Valley Transit Authority (PVTA) oversees and coordinates public transportation in the Pioneer Valley of Western Massachusetts, offering fixed-route bus service, paratransit service, and senior van service. PVTA was created by Chapter 161B of the Massachusetts General Laws in 1974. Based in Springfield, Massachusetts, PVTA serves Hampden and Hampshire counties, and provides connecting service to CTtransit in Hartford County, Connecticut, to FRTA in Franklin County, and to WRTA in Worcester County. It is the largest regional transit authority, and second largest public transit system in Massachusetts after the Massachusetts Bay Transit Authority, providing service to over 11 million riders annually across 24 municipalities in the region, with about 70% of all riders using the system as their primary mode of transit.