Route information | ||||
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Maintained by MassDOT | ||||
Length | 41.91 mi[1] (67.45 km) | |||
Major junctions | ||||
West end | Route 123 in Cumberland, RI | |||
East end | Route 3A in Scituate | |||
Location | ||||
Country | United States | |||
State | Massachusetts | |||
Counties | Bristol, Plymouth | |||
Highway system | ||||
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Route 123 is a 41.91-mile-long (67.45 km) east–west (though geographically more northeast-southwest) state highway in southeastern Massachusetts. It crosses northern Bristol and Plymouth counties, crossing several highways along the way.