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Route 1A
Route information
Maintained byMassDOT
Length	95.120 mi[1] (153.081 km)
Existed	By 1927–present
Major junctions
South end	US 1A inPawtucket, RI
Major intersections	I-95 inAttleboro I-495 inWrentham US 1 inDedham I-93 /US 1 /Route 3 inBoston I-90 Toll /Mass Pike in Boston Route 128 inBeverly US 1 fromNewburyport toSalisbury
North end	NH 1A inSeabrook, NH
Location
Country	United States
State	Massachusetts
Highway system
Massachusetts State Highway System Interstate US State
←US 1 →Route C1

Route 1A is a north–southstate highway inMassachusetts, United States. It is an alternate route toU.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 theBig Dig, Route 1A is discontinuous in the downtownBoston area. Vehicles enteringDowntown Boston via theSumner Tunnel must take I-93 north to the exit forGovernment 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]

A short segment of Route 1A, 1.8 miles (2.9 km) in length, inAttleboro runs fromU.S. Route 1A at theRhode Island border through a junction withInterstate 95, before heading north and merging with Route 1. The entire length of this segment is known as Newport Avenue.

This segment of Route 1A extends roughly north fromNorth Attleborough toDedham, passing through the towns ofPlainville,Wrentham,Norfolk,Walpole,Norwood andWestwood on the way. Prior to its realignment alongI-95 andI-93, Route 1 continued north along the Providence Highway towards Boston at the junction of Route 1A and that road.

This segment of Route 1A extends fromBoston, Massachusetts toSalisbury, Massachusetts.

The highway starts from US 1 (which is on theCentral Artery withI-93 andRoute 3) at the formerGovernment Center/Logan Airport interchange. It passes through theCallahan Tunnel (outbound/northbound) andSumner Tunnel (inbound/southbound), becoming the East Boston Expressway pastLogan Airport. The East Boston Expressway was the first freeway built in the city. Immediately beyondLogan Airport,Interstate 90 ends at Route 1A.

The road continues as adivided highway throughRevere. It is a limited access highway through Revere, passingSuffolk Downs and the Wonderland Greyhound Park (which is across the street from the outer terminus of theMBTA's Blue Line), before running through the isolated Point of Pines neighborhood and exiting Revere over theGeneral Edwards Bridge intoLynn. For the first mile and a half in Lynn, it is concurrent with the Lynnway, and is a high-traffic retail area. After the Lynnway portion, the route becomes concurrent withRoute 129 for a mile, before crossing intoSwampscott as Paradise Road. AtVinnin Square, it passes intoSalem as Loring Avenue, passing by Salem State University. The route turns left onto Lafayette Street and is concurrent with Route 114. At the intersection with Derby Street, notable for the large fire station, the route turns right. At the next stop sign, the route turns left onto Hawthorne Boulevard passing Salem Common and the Salem Witch Museum before turning left onto Winter Street. At the end of Winter Street, the route turns right onto Bridge Street crossing theVeterans Memorial Bridge intoBeverly. It follows two of the main streets of downtown Beverly, before heading north, passing throughWenham andHamilton (through this section the road is occasionally signed as a US Route) before becoming the main road through the town ofIpswich, crossing the historic Choate Bridge over the Ipswich River. While in Ipswich, much of the route runs concurrently withRoute 133 until just over the town line intoRowley. It passes through the main village of Rowley, as well as the central villages ofNewbury. InNewburyport, Massachusetts, it merges withRoute 1, signed with its parent highway over theMerrimack River and into the town center ofSalisbury. It then heads east from the Salisbury town center before turning north and ending in Salisbury Beach at theNew Hampshire border.New Hampshire Route 1A continues north from this point.

Initially, Route 1A ran along part of its present-day route between the New Hampshire state line and Revere. It then turned west along present-day Route 16 until it ended at US 1 (now Route 99) in Everett.^[3] Then, in 1931, an interchange in Revere was built over Route 107 (Broadway).^[4] In 1933, another, disconnected portion of Route 1A appeared between Attleboro and the Rhode Island state line.^[5] In 1934, two changes were made to the route. In Revere, the route was realigned to turn west smoothly. Between Boston and North Attleborough, a huge portion of Route 11 and all of Route 150 were replaced by Route 1A.^[6] The new portion soon got truncated to Dedham in 1936.^[7]It then got truncated even further to end at US 1/Route 128.^[8]

After Route C1 was decommissioned in 1971 in favor of a new alignment of US 1, Route 1A was truncated to a roundabout interchange in Revere. As a result, Route 16 extended eastward along the then-former route.^[9] After all unbuilt Boston freeways were cancelled by 1973, US 1 was rerouted onto the Northeast Expressway (formerly proposed I-95). As a result of that, Route 1A was extended south towards the Sumner/Callahan Tunnels and then north along Central Artery towards US 1 (Storrow Drive).^[10] In 1989, US 1 was rerouted from Storrow Drive onto I-93's Southeast Expressway, causing "signed" Route 1A to get truncated.

County	Location	mi[1]	km	Destinations	Notes
Bristol	Attleboro	0.000	0.000	US 1A south –Pawtucket	Continuation intoRhode Island
		0.412	0.663	I-95 –Foxboro,Boston,Providence, RI	Exits 2A-B on I-95
		1.637	2.634	Route 123 –Attleboro,Brockton,Valley Falls, RI
		1.728	2.781	US 1 south	Southern terminus of unsigned concurrency with US 1
	SeeUS 1 mileposts 2.4–7.0
	North Attleborough	7.109	11.441	US 1 north –Boston	Northern terminus of unsigned concurrency with US 1
Norfolk	Plainville	7.981	12.844	Route 106 east toUS 1 –Mansfield,West Bridgewater	Western end of Route 106
	Wrentham	10.634	17.114	I-495 toI-95 –Taunton,Cape Cod,Marlboro,Lowell	Exit 38 on I-495
		11.375	18.306	Route 121 south –Woonsocket, RI	Northern end of Route 121
		12.840	20.664	Route 140 –Franklin,Foxboro,Taunton
	Norfolk	15.091	24.287	Route 115 –Foxboro,Norfolk,Millis
	Walpole	19.70	31.70	Route 27 –Walpole,Sharon,Stoughton
	Dedham	27.144	43.684	Providence Highway toI-95 /US 1 /Route 128 –Boston,Providence, RI	Formerly US 1, south end of silent concurrency with Providence Highway and then US 1
SeeRoute 128 exits 37-39 andI-93 exits 1-17B
Suffolk	Boston			I-93 north (US 1) /Route 3 north (Storrow Drive) –Government Center	Northern terminus of silent concurrency with US 1; exit 17B on Central Artery; last northbound exit before toll
				Haymarket Square	Northbound entrance only
				Sumner (southbound) /Callahan (northbound) Tunnels
		49.482	79.634	East Boston	Access via Porter Street; last southbound exit before toll
		49.677– 50.023	79.947– 80.504	I-90 Toll west /Mass Pike west toI-93 south –Williams Tunnel,Logan Airport	Eastern end of I-90 / Mass Pike; no northbound access to I-90
		50.305	80.958	Route 145 north (Bennington Street) –Winthrop,Chelsea	Interchange, southern end of Route 145
	Revere	52.487	84.470	Route 145	Interchange, northbound exit and southbound entrance
		52.852	85.057	Route 16 west /Route 60 west –Malden,Lynn,Revere Beach,Chelsea	Eastern end of Routes 16 and 60; To US 1 via Route 60 and Route 145 via Route 16
Essex	Lynn	55.843	89.871	Lynnway east –Nahant,Swampscott
		58.018	93.371	Route 129 west –Lynnfield	Southern terminus of concurrency with Route 129
		59.167	95.220	Route 129 east –Swampscott,Marblehead	Northern terminus of concurrency with Route 129
	Salem	62.554	100.671	Route 114 east –Marblehead	Southern terminus of concurrency with Route 114
		63.326	101.913	Route 114 west	Northern terminus of concurrency with Route 114
		64.250	103.400	Route 107 south –Lynn,Malden	North end of Route 107
	Danvers River	64.933	104.500	Essex Bridge
	Beverly	65.447	105.327	Route 22 north /Route 127 north	South end of Routes 22 and 127
		66.242	106.606	Route 62 –Danvers,Beverly Farms
		67.699	108.951	Route 97 north –Topsfield	South end of Route 97
		67.897	109.270	Route 128 –Gloucester,Rockport,Peabody,Boston	Exits 45A-B on Route 128; cloverleaf interchange
	Ipswich	75.603	121.671	Route 133 east –Essex	Southern terminus of concurrency with Route 133
	Rowley	79.754	128.352	Route 133 west –Georgetown	Northern terminus of concurrency with Route 133
	Newburyport	88.395	142.258	Route 113 west –West Newbury,Groveland	East end of Route 113
		88.588	142.569	US 1 south –Danvers,Boston	Southern terminus of concurrency with US 1, southbound exit and northbound entrance
	Salisbury	90.879	146.256	US 1 north /Route 110 west –Amesbury,Merrimac,Salisbury Beach	Northern terminus of concurrency with US 1, east end of Route 110
		95.120	153.081	NH 1A north toNH 286 –Hampton	Continuation intoNew Hampshire
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Electronic toll collection       Incomplete access

Wikimedia Commons has media related toMassachusetts Route 1A.

• Massachusetts Executive Office of Transportation - Boston's First Expressway
• East Boston Expressway - Historic Overview

• Numbered routes in Massachusetts
• U.S. Route 1
• North Attleborough, Massachusetts
• Plainville, Massachusetts
• Historic trails and roads in Dedham, Massachusetts

• Articles with short description
• Short description matches Wikidata
• Use mdy dates from January 2025
• Articles needing additional references from January 2013
• All articles needing additional references
• Infobox road instances in Massachusetts
• Pages using gadget WikiMiniAtlas
• Articles using KML from Wikidata
• Commons category link is on Wikidata
• Pages using the Kartographer extension