ST. PETERSBURG, Fla. – A serious crash involving a motorcycle temporarily shut down a portion of a busy road Friday morning in St. Petersburg, police said. The crash happened before 7:20 a.m. Friday on 4th Street N in the area between 54th Ave. N and 62nd Ave. N. Police offered few details, but we do know the crash involved a motorcycle and a car. The motorcyclist is in critical condition as a result of the crash.