Conduit Avenue is designated as New York State Route 27 between Linden Boulevard and the Nassau County border and accommodates car, bus and truck traffic. Westbound vehicles use the roadway named North Conduit Avenue; eastbound vehicles use South Conduit Avenue. At various times the road has been used as a drag strip, particularly in Rosedale.
The western segment of the highway, between Atlantic Avenue and Cross Bay Boulevard, was originally slated to be the eastern part of a planned, but never built, Bushwick Expressway. That highway was proposed to run from the Williamsburg Bridge through Williamsburg, Bushwick and East New York before feeding into the Belt Parkway.