David Chesler's Road Sign Page
Includes photographs and descriptions of awkward signs in the Boston area.

The Roads of Massachusetts
Shows starting and ending points for routes in state.

John Carr's Maps
Show the routes of several state routes in Boston.

Massachusetts Turnpike
The Masspike (I-90) runs east-west from New York to Boston. Includes commuter information including the Fast Lane electronic toll collection program, traveler tips, news, and goods and services contracts available.

Boston's Cancelled Highways
Includes a list and photographs of formerly proposed facilities in the area.

Route 3 North Construction
Includes information on multi-year project schedule, commuting options, and community meetings.

BostonRoads.com
Descriptive histories of highways, bridges, and tunnels. Includes links to exit lists and current traffic conditions.

Boston Exit of the SPUI Freeway
Boston exit lists, photos, and route log.

MassGIS
Massachusetts Highway Department roads datalayer description files by locality.

Massachusetts Sportbike Roads
Twisty trips for sportbike riders.

Streets and Roads in Waltham
Collection of photographs and highlights to Waltham geography.

Massachusetts Highway Department
Commonly known as MassHighway. Responsible for state highways. Includes information on commuting, recycling, and traffic statistics.

Massroads.com
Photography and information about bridges, highways, trains and railroads. Contains scenic photographs and the NBI bridge database.

Freeways of Hartford and Hampden Counties
Descriptions from the Springfield and Hartford, Connecticut, areas.

US-5: A Highway to History
Covers this route from prehistoric times.

Massachusetts State Highways
Route log with histories.

Gorp: The Mohawk Trail
Guide to scenic drive along the Mohawk Trail in Berkshire Mountains.

Boston Post Road: Milestones of History
Associated Press article at CNN.com.