 In Perth Amboy, the route becomes four-lane, undivided Convery Boulevard upon crossing County Route 656 (Smith Street).The route continues north through commercial and residential sections of Perth Amboy, crossing over a connector to Route 440 and Conrail Shared Assets Operations' Perth Amboy Running Track line.It intersects the eastbound direction of Route 184, the former alignment of Route 440, before meeting Route 440 (also an unsigned part of County Route 501) at an interchange.