 | This article needs additional citations for verification. (January 2013) |
 Route 1A | ||||
|---|---|---|---|---|
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| Route information | ||||
| Maintained by MassDOT | ||||
| Length | 95.120 mi[1] (153.081 km) | |||
| Existed | By 1927–present | |||
| Major junctions | ||||
| South end |  US 1A in Pawtucket, RI | |||
 I-95 in Attleboro I-495 in Wrentham US 1 in Dedham  I-93 / US 1 / Route 3 in Boston  I-90 Toll / Mass Pike in Boston Route 128 in Beverly US 1 from Newburyport to Salisbury | ||||
| North end |  NH 1A in Seabrook, NH | |||
| Location | ||||
| Country | United States | |||
| State | Massachusetts | |||
| Highway system | ||||
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Route 1A is a north–south state highway in Massachusetts, United States. It is an alternate route to U.S. 1 with three signed sections and two unsigned sections where the highway is concurrent with its parent. Due to the reconfiguration of tunnel interchanges brought on by the completion of the Big Dig, Route 1A is discontinuous in the downtown Boston area. Vehicles entering Downtown Boston via the Sumner Tunnel must take I-93 north to the exit for Government Center and make a U-turn to access the entrance ramp to I-93 south (which silently carries Route 1A south as well) and vice versa.[2]
- ^ "Massachusetts Route Log Application". Massachusetts Department of Transportation. 2012. Archived from the original on August 26, 2014. Retrieved November 26, 2014.
- ^ Executive Office of Transportation - Office of Transportation Planning Roads - June 2008 The older tunnels to and from East Boston have interchanges with I-93 and surface roads north of the point at which unsigned Route 1A "exits" Route 1 in downtown Boston. Unsigned Route 1A along the Fitzgerald Expressway does not directly connect to those tunnels; a direct connection requires using I-90 and the newer Ted Williams Tunnel, which is not concurrent with Route 1A at any point.