“…8 Some of the variation in seatbelt use may be related to traffic laws and enforcement. 9,10,12,13 Primary laws, which allow an officer to stop and ticket occupants solely because they are unrestrained, have been shown to increase seatbelt use by as much as 22%, 10 and reduce fatality by as much as 7%. 12 Secondary laws, which permit a citation for lack of restraint use only if a motorist has been stopped for another reason, have been shown to increase seatbelt use as much as 11%.…”