This layer is the official state-maintained major street transportation dataset available from MassGIS and represents major roadways, including designations for Interstate, U.S. and State highways.Formerly known as the Massachusetts Highway Department Major Roads, it includes linework from the 1:5,000 Road and Rail Centerlines that was interpreted as part of the Black and White Digital Orthophoto project. The Executive Office of Transportation - Office of Transportation Planning (EOT-OTP), which maintains this layer, added other linework using the Color Orthophoto Imagery as a base. The layer is up-to-date through December 2006.In ArcSDE this layer is named EOTMAJROADS_ARC.