May 18 to May 31 is the annual “Click it or Ticket” seat belt use campaign being conducted by law enforcement officers throughout the USA.  The below article published by the National Safety Council.

 "Thousands of law enforcement officers across the nation will enforce seat belt laws May 18-31 during the annual "Click It or Ticket" campaign. This year's campaign will focus on teen drivers and nighttime driving. Research (.pdf file) from the National Highway Traffic Safety Administration shows that of the 4,540 16- to 20-year-old passenger vehicle occupants killed in 2007, approximately 2,502 were unbelted at the time of the crash. The odds of being killed in a motor vehicle crash are three times greater at night and if the driver is not using a seat belt. In 2007, 65 percent of the 16- to 20-year-olds killed in nighttime crashes were unbelted at the time. Seat belt use is the most effective protection against serious crash injuries, reducing the risk by 50 percent, according to NHTSA. In 2008, seat belt use nationwide was 83 percent. The Department of Transportation estimates that 1,652 lives could be saved and 22,373 serious injuries avoided each year on America's roadways if seat belt use rates rose to 90 percent in every state. New DOT data also estimates that seat belts saved approximately 15,147 lives in 2007. "