Massachusetts Route 99

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Route 99 marker

Route 99
Route information
Length: 6.40 mi[1] (10.30 km)
Major junctions
South end: Chelsea Street, Charlestown, Boston
  MA Route 38.svg Route 38 in Charlestown
MA Route 16.svg Route 16 in Everett
MA Route 60.svg Route 60 in Malden
North end: US 1.svg US-1 in Saugus
Counties: Suffolk, Middlesex, Essex
Highway system
  • Massachusetts State Highway Routes
Route 98 Route 101

Route 99 is a north–south state highway in metropolitan Boston.

Route description[edit]

Route 99 begins at the intersection of New Rutherford Avenue and Chelsea Street, over the northbound tunnel of U.S. Route 1 created during the Big Dig. It continues along New Rutherford Avenue, passing onramps to Route 1 and Bunker Hill Community College before entering Sullivan Square, where Route 38 begins next to the MBTA station. It then turns northeastward onto Alford Street, crossing the Malden Bridge over the Mystic River. After passing through a small strip of Boston on the east banks of the river, the route enters Everett and becomes Broadway.

Broadway crosses through Sweetser Circle, the intersection with Route 16 and the Revere Beach Parkway. The route continues northeastward into the city of Malden, where it intersects Route 60. The route continues on through a short (0.25 miles (0.40 km)) corner of Melrose before entering Saugus. Once in Saugus the route terminates at ramps leading back to Route 1.


The Charlestown Bridge from Boston's North End into Charlestown used to be that starting point of the route; however, the latest GIS data from the Massachusetts Department of Transportation indicates that it is no longer the starting point for Route 99.[2] This probably became the case upon completion of the Big Dig's moving of Route 1.

Sweetser Circle has been the site of numerous major accidents,[3] including a gas tanker rollover early on December 5, 2007 that resulted in 9,400 U.S. gallons (36 kL) spilling, igniting and destroying 21 vehicles and two large multi-family homes.[4]

Prior to the designation as Route 99, the entire route was part of US-1 before the construction of the Northeast Expressway.

Junction list[edit]

Route 99, as observed from the Bunker Hill Community College skywalk in Charlestown.
County Location Mile km Destinations Notes
Suffolk Boston 0.00 0.00 Chelsea Street Southern terminus of Route 99.
0.2 0.3 US 1 Ramp ending from southbound and to northbound Route 1.
1.1 1.8 Route 38 north Southern terminus of Route 38 at Sullivan Square.
Middlesex Everett 2.5 4.0 Route 16 Sweetser Circle: Access to Route 16 / Revere Beach Parkway
Malden 4.8 7.7 Route 60
Essex Saugus 6.40 10.30 US 1 Northern terminus of Route 99 at Route 1.
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ Executive Office of Transportation, Office of Transportation Planning - 2006 Road Inventory
  2. ^ Executive Office of Transportation - Office of Transportation Planning Roads - June 2008
  3. ^ WBZ News
  4. ^ By David Abel and John R. Ellement

Photos related to renovation of Route 99 in Charlestown: [1] [2]