New Jersey Route 121 is a state highway located in New Jersey. It runs approximately 2.5 miles, connecting Route 1 in Edison to Route 27 in Metuchen. The route primarily serves local traffic and provides access to residential areas and businesses. The highway is known for its straightforward layout, featuring a mix of residential and commercial zones along its path. It is an important connector for residents traveling between these two major routes, facilitating easier access to surrounding neighborhoods and amenities.