Road crews are finishing work to create a more gradual slope leading up to a railroad crossing in Columbia Station, where a car crash killed four teenagers last year. Young drivers were known to use the steep crossing as a ramp to go airborne in speeding vehicles. The Ohio Department of Transportation says a 450 thousand dollar project has eased the approach to the crossing that is expected to re-open Thursday. A car carrying Brunswick High School students went airborne and crashed at the crossing in June 2012. Two of the teens who died were scheduled to graduate later that day. New caution signs were added near the crossing after the crash, and the recommended speed limit was lowered.