In the U.S. state of Massachusetts, U.S. Route 1 is a major north-south state highway through Boston. The portion of US 1 south of Boston is also known as the Boston-Providence Turnpike, and portions north of the city are known as the Northeast Expressway and the Newburyport Turnpike.
Route description
US 1 enters the state from Rhode Island at Attleboro. It closely parallels Interstate 95 as it goes through the towns of North Attleboro, Plainville, Wrentham, Foxborough, Walpole, Sharon, Norwood (where a segment is known as the Norwood Automile due to the many car dealerships that line the road), and Westwood. US 1 then has a wrong-way concurrency with Interstate 95 up to the junction with Interstate 93 then travels along Interstate 93 from Canton through downtown Boston, separating from the Interstate just after passing through the Thomas P. O'Neill Jr. Tunnel and crossing the Leonard P. Zakim Bunker Hill Memorial Bridge. The route crosses the Tobin Bridge traveling over Chelsea and Revere as a freeway known as Boston's Northeast Expressway, then as a traditional six lane expressway (surface road without at-grade intersections or traffic lights) through Malden, Melrose, Saugus and Lynnfield. From Lynnfield, US 1 again closely parallels Interstate 95 going through the towns of Peabody, Danvers, Topsfield, Ipswich, Rowley, Newbury, Newburyport, and Salisbury, before it enters the state of New Hampshire.
Route 1A runs alongside Route 1 in four parts of the state.
Exit list
All exits are unnumbered.
| County |
Location |
Mile |
Destinations |
Notes |
| Suffolk |
Boston |
Junction with   I-93/Route 99 |
| Tobin Bridge crossing over the Mystic River (toll) |
| Chelsea |
? |
Beacon Street |
Northbound only exit |
| ? |
4th Street |
Northbound only exit |
| ? |
Carter Street |
Southbound only exit |
| ? |
Webster Avenue — Chelsea, Everett |
Northbound only exit |
| Revere |
? |
 Route 16 East to  Route 1A — Revere Beach, Lynn |
Southbound only exit |
| ? |
Sargent Street — West Revere |
Northbound only exit |
| ? |
 Route 60 — Malden, Revere |
|
| ? |
Lynn Street — Malden, Saugus |
| Essex |
Saugus |
? |
MA Route 99 South — Malden, Everett |
Southbound only exit |
| ? |
Essex Street — Melrose, Saugus |
Reverse direction for MA Route 99 South |
| ? |
Main Street — Saugus, Wakefield |
|
| ? |
Lynn Fells Parkway — Melrose, Stoneham |
|
| ? |
 MA Route 129 Walnut Street — Saugus, Lynn |
MA Route 129 joins US Route 1 northbound |
| Lynnfield |
? |
MA Route 129 Salem Street — Lynnfield Center |
MA Route 129 leaves US Route 1 |
| ? |
 I-95 South / Route 128 North — Waltham, Gloucester |
Allows access to I-95 North and MA Route 128 South |
| Peabody |
? |
I-95 North — Portsmouth, NH |
Northbound only exit |
| ? |
Lowell Street — Peabody, Lynnfield |
| ? |
 Route 114 — Peabody, Middleton |
|
History
Lower Boston Post Road
Turnpike era
Most of US 1 consists of two former turnpike roads — the Norfolk and Bristol Turnpike and the Newburyport Turnpike. The older roads that these turnpikes were meant to bypass are now mostly Route 1A.
Designation of Route 1
Massachusetts Route C1
In the early 1930s, Route C1 was designated as an alternate route of US 1 through downtown Boston. The "C" indicated a city route. The C designation was apparently distinct to the Boston area. Route C1 ran along Brookline Avenue, Beacon Street, Embankment Road (modern Route 28), Charles Street, Lowell Street, Merrimac Street, and Cross Street to the west end of the Sumner Tunnel. In East Boston, it went via Porter Street to Chelsea Street then shifted to the William McClellan Highway (modern Route 1A). As Storrow Drive and the Central Artery opened in the 1950s, Route C1 was rerouted to follow portions of these highways. The Route C1 designation was removed in 1971, with US 1 taking over most of the alignment south of the Charles River, and Route 1A taking over most of the alignment north of the river. US 1 was later moved onto the Southeast Expressway leaving most of the former alignment of C1 south of the river as having no number.
Relocation in Boston
US 1 replaced the cancelled I-95 on the Northeast Expressway, north of downtown Boston, in the 1970s.[2] In the late 1980s, US 1 was moved onto I-93 south of and through Boston, leaving the old route - VFW Parkway, Jamaicaway, Riverway, and Storrow Drive - without a number. There are still some street signs incorrectly indicating the former alignment as US 1, and many local residents still believe that Route 1 runs along its old trajectory.[citation needed]
References
US 1 in Pawtucket, RI
I-295 in North Attleboro
I-495 in Plainville
I-95 / Route 128 in Dedham
I-90 in Boston
I-93/Route 99
Route 16 East to 
Route 1A — Revere Beach, Lynn
Route 60 — Malden, Revere
MA Route 129 Walnut Street — Saugus, Lynn
I-95 South /
Route 128 North — Waltham, Gloucester
Route 114 — Peabody, Middleton
