state route mile north south state highway central portion state ohio highway southern terminus northwestern columbus suburb dublin intersection mainly lane highway follows eastern dublin junction crossing river highway parallels river western bank northern terminus intersection western village limits prospect created extended route description way travels primarily north northwestern western extreme southern following way segments included national_highway_system network highways identified important economy mobility defense nation starts intersection route moves north intersecting parkway currently built eastward continues north hard road entrance yards hard crossing franklin delaware county line major junction dam route follows eastern bank reservoir intersection miles later meets traffic circle home road provides access heading west parkway liberty heading east continues north signaled intersection runs concurrently mile route travels southwest northern terminus concurrency ends turns north passes communities township way intersecting miles north continuing north crosses flashing red light miles route crosses prior ending prospect crossing minor roads history designation applied originally highway routed present southernmost alignment eastern banks dublin northeastern junction extended short concurrency north present alignment western river new northern terminus west delaware years northward extension extended north time present northern terminus prospect designated general memorial highway december major intersections
Ohio State Route 257