Route 175 is a short, 2.95-mile (4.75 km) long state highway in Mercer County, New Jersey, United States. The route runs along a former alignment of Route 29 before the construction of the John Fitch Parkway in the 1960s. The route begins at Route 29 in the capital city of Trenton, running along Sanhican Road, River Road, and West Upper Ferry Road into Ewing Township. The route serves primarily as a frontage road for Route 29. The northernmost portion of Route 175 is parallel to the Delaware and Raritan Canal until coming to an end at a merge with Route 29 in Ewing Township.
View northbound along Route 175 from the West Trenton Railroad Bridge, with Route 29 visible to the left
Route 175 heading northbound through Ewing Township
Intersection of Route 29, Route 175 and Lower Ferry Road in Ewing, with signage noting Route 175 as "River Road." The West Trenton Railroad Bridge is in the background.
Route 29 is a state highway in the U.S. state of New Jersey. Signed north-south, it runs 34.76 mi (55.94 km) from an interchange with Interstate 295 (I-295) in Hamilton Township in Mercer County, where the road continues east as I-195, northwest to Route 12 in Frenchtown, Hunterdon County. Between the southern terminus and I-295 in Ewing Township, the route is a mix of freeway and expressway that runs along the Delaware River through Trenton. This section includes a truck-restricted tunnel that was built along the river near historic houses and Riverview Cemetery. North of I-295, Route 29 turns into a scenic and mostly two-lane highway. North of the South Trenton Tunnel, it is designated the Delaware River Scenic Byway, a New Jersey Scenic Byway and National Scenic Byway, that follows the Delaware River in mostly rural sections of Mercer County and Hunterdon County. The obsolete Delaware & Raritan Canal usually stands between the river and the highway. Most sections of this portion of Route 29 are completely shaded due to the tree canopy. Route 29 also has a spur, Route 129, which connects Route 29 to U.S. Route 1 (US 1) in Trenton.
Route 29 northbound through downtown Trenton, with the Delaware River on the left
Route 29 northbound past northern terminus of Route 175 in Ewing Township
Route 29 northbound past CR 519 in Delaware Township
Route 29's mis-signed northern terminus when entering Frenchtown. Route 29 continues to Frenchtown and Route 12 despite the signage.