rtokens: The first portion of the campaign involves pickup trucks equipped with billboards that were driving along some of the nation 's busiest interstate highways during the Labor Day weekend , including Interstate 95 on the East Coast , Interstates 80 and 90 in the Midwest and Interstate 5 in California .
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tokens: Since 1993 , 24 children have been killed by the explosive force of automotive air bags , which inflate at speeds up to 200 miles per hour .
ltokens: Officials said they will work with law enforcement agencies , pediatricians and media to warn parents about the dangers that air bags pose to children and adults not wearing seatbelts .