sentences:  Patchogue–Mount Sinai Road was built as a four-lane highway, while North Ocean Avenue was originally a two-lane road.In the late 1940s, the one-lane arch bridge that carried the Long Island Rail Road over North Ocean Avenue was replaced with a concrete slab bridge with provisions for a second lane.From the 1940s into the 1970s, this bridge had an empty right of way for an unbuilt southbound lane, implying that the proposal to widen the road dated back to the post-war era.