A moped driver was killed in Queens Saturday evening after police said he crashed into a highway divider. The 37-year-old victim was found unconscious near  Lefferts Blvd. and the Nassau Expressway around 7:15 p.m., police said. EMS techs declared him dead at the scene. Police said the victim, whose name was not immediately released, appeared to be driving east on the expressway when he hit a divider. The investigation is ongoing, cops said.