Route 3A | |||||||
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Route information | |||||||
Length | 97 mi (156 km) | ||||||
Existed | 1926 – present | ||||||
Southern section | |||||||
Length | 53.392 mi (85.926 km) | ||||||
South end | Route 3 in Plymouth | ||||||
Major junctions |
US 44 in Plymouth Route 53 in Kingston Route 53 in Quincy |
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North end | I‑93 / US 1 / Route 3 / Route 203 in Boston | ||||||
Northern section | |||||||
Length | 22.504 mi (36.217 km) | ||||||
South end | I‑95 / US 3 / Route 128 in Burlington | ||||||
Major junctions |
Lowell Connector in Lowell Route 110 in Lowell Route 113 in Tyngsborough |
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North end | NH 3A in Hudson, NH | ||||||
Location | |||||||
Counties | Plymouth, Norfolk, Suffolk, Middlesex | ||||||
Highway system | |||||||
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Route 3A is a state highway in eastern Massachusetts, which parallels Route 3 and U.S. Route 3 from Cedarville in southern Plymouth to Tyngsborough at the New Hampshire state line.
Route 3A has two major posted segments, separated by a lengthy concurrency with Route 3 and US 3. Its southern portion parallels Route 3 from Cedarville in southern Plymouth to Neponset in the Dorchester area of Boston. Towns and cities that Route 3A traverse along its path include Plymouth, Kingston, Duxbury, Marshfield, Scituate, Cohasset, Hingham, Weymouth and Quincy.