New Jersey Route 129

Route 129
Canal Boulevard
Route information
Auxiliary route of Route 29
Maintained by NJDOT
Length	2.41 mi[1] (3.88 km)
Existed	September 1993[2]–present
Major junctions
South end	South Lamberton Road in Hamilton Township
Major intersections	Route 29 in Hamilton Township US 206 in Trenton
North end	US 1 in Trenton
Location
Country	United States
State	New Jersey
Counties	Mercer
Highway system
New Jersey State Highway Routes Interstate US State Scenic Byways
← Route 124 → US 130

Route 129 is a north-south expressway in the capital city of Trenton, New Jersey. The highway runs along Canal Boulevard through portions of Trenton, serving as an alternative highway to its parent, Route 29. The route begins at an intersection with South Lamberton Road in Hamilton Township, and heads northward along NJ Transit's River Line until terminating at an interchange with U.S. Route 1 (US 1; the Trenton Freeway).

The original use of Route 129 opened in 1961 on what is now Interstate 295 (I-295) from the Scudder Falls Bridge to Scotch Road in Trenton. The route was replaced in 1974 by I-95 (re-designated as I-295 in 2018), while the route's current incarnation opened in September 1993 along a former portion of the Delaware and Raritan Canal. The route has remained virtually untouched since its opening.