The “Click It or Ticket” seat belt enforcement campaign is underway through June 4.

As motorists prepare for summer travel, the Washington Traffic Safety Commission emphasizes the simplest step to keep families safe: buckle up.

The state patrol, sheriff’s office and police departments will put special emphasis on seat belt and proper child restraint use.

Motor vehicle crashes are a leading cause of unintentional death among children. From 2011-2015, almost half of child fatalities caused by a vehicular collision had unknown or no restraint use, 15 percent of those were under 13 years old and illegally riding in the front seat, and 21 percent were riding without a booster – restrained only by a lap-shoulder seat belt.