To ensure continued safety of motorists and train passengers alike, Long Island Rail Road workers will renew the railroad crossing at William Floyd Parkway (Suffolk County Route 46), between 10 p.m. Friday, May 12, and 5 a.m. Sunday, May 14. The work will include a rehabilitation of the concrete railroad crossing surface, as well as the tracks, including the steel rails and adjacent concrete ties, and the compacted stone bedding the ties rest in, which is known as ballast.