Massachusetts Route 123

Route 123
Route 123 highlighted in red
Route information
Maintained by MassDOT
Length	41.91 mi[1] (67.45 km)
Major junctions
West end	Route 123 in Cumberland, RI
Major intersections	US 1 in Attleboro I-95 in Attleboro I-495 in Norton Route 24 in Brockton
East end	Route 3A in Scituate
Location
Country	United States
State	Massachusetts
Counties	Bristol, Plymouth
Highway system
Massachusetts State Highway System Interstate US State
← Route 122A → Route 124

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.