Drag racing, double-parked cars and scattered debris — those are only a few of the hazardous conditions commonly found on Sunset Park’s Third Avenue, according to residents who feel the corridor is growing more dangerous. “It’s like a second expressway,” John Delooper said on Wednesday at a Community Board 7 visioning workshop held to identify issues and potential solutions for improving the safety and accessibility of the strip for pedestrian, bicycle and vehicular traffic. The roadway, which runs below the Gowanus Expressway, has a startling history of accidents. …