SRPEDD's Transportation Planning Department encompasses an array of planning areas, including Regional Transportation Planning, Public Transit, Bicycle & Pedestrian Networks, Transportation Infrastructure, Complete Streets, Regional Corridor Studies and more. 

The SRPEDD region is the state-designated Southeastern Massachusetts Metropolitan Planning Organization (SMMPO) in accordance with federal transportation law.  SRPEDD is the public regional planning agency established by state legislature for 27 communities and also acts as technical and support staff to the SMMPO. In cooperation with MassDOT, SRPEDD is responsible for the planning and programming of all modes of transportation including highways, public transit, freight, bicycles & pedestrians. SRPEDD also provides technical assistance to our cities and towns and to the region's two transit authorities, Greater Attleboro Taunton Regional Transit Authority (GATRA) and Southeastern Regional Transit Authority (SRTA). 

The 27 communities of the SRPEDD region include the cities of Attleboro, Fall River, New Bedford and Taunton, and the towns of Acushnet, Berkley, Carver, Dartmouth, Dighton, Fairhaven, Freetown, Lakeville, Mansfield, Marion, Mattapoisett, Middleborough, North Attleborough, Norton, Plainville, Raynham, Rehoboth, Rochester, Seekonk, Somerset, Swansea, Wareham and Westport.