The Massachusetts Highway Department (MassHighway) was the name of the highway department in the United States Commonwealth of Massachusetts from 1991 until it became the highway division of the Massachusetts Department of Transportation (MassDOT) on November 1, 2009. The responsibilities of MassHighway included the design, construction and maintenance of all state highways and bridges and signage of numbered routes. During that time it was a part of the Massachusetts Executive Office of Transportation (EOT), which was also reorganized into the Department of Transportation. As part of the reorganization, the separate Massachusetts Turnpike Authority was dissolved and its duties assumed by the MassDOT highway division.
The department was split into five district offices managed by a District Highway Director (DHD) under the supervision of the Chief Engineer at MassHighway headquarters in Boston. This district plan has been continued under MassDOT with tentative plans to reconfigure the Boston area for a sixth district in 2010.
The Massachusetts Highway Commission was established in 1893 with three commissioners appointed by the governor. It was responsible for assisting local governments with road design, construction, mapping and organization. The commission was replaced in 1919 by the Massachusetts Department of Public Works (DPW), which became the main state agency overseeing all aspects of road construction and maintenance. The DPW was renamed the Massachusetts Highway Department in 1991.