Route 29 is a state highway in the U.S. state of New Jersey. It runs from an intersection with Interstate 295 in Hamilton Township in Mercer County, where it continues as Interstate 195, to Route 12 (Bridge Street / Race Street) in Frenchtown, Hunterdon County. Between the southern terminus and Interstate 95, the route is a mix of freeway and four-lane divided highway 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 Interstate 95, 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 in Trenton.