Massachusetts (Major Roads, 2002)
- This datalayer represents the “major roads” in the Commonwealth from the Massachusetts Highway Department (MHD) Roads datalayer. Four classes of road are included: Limited Access Highways (such as Interstates with on- and off-ramps as the only means of access), Multi-lane Highways without limited access, Other Numbered Highways (such as state and Federal routes that are not included in the previous two categories), and Major Road-Collectors (non-numbered routes that connect numbered routes).
- Massachusetts Office of Geographic and Environmental Information (MassGIS)
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