OLYMPIA, Wash. - Anti-smoking groups are rounding up sponsors for legislation that would outlaw smoking in vehicles when children are passengers.

A member of the Tobacco Advisory Board of Pierce County, Leonard Sanderson, told The Olympian the proposal would make it a secondary offense, meaning smoking drivers could be ticketed if they were pulled over for another offense, such as speeding.

Four other states have outlawed smoking in cars with children: California, Arkansas, Louisiana and Maine. A similar bill died in last year's session of the Washington Legislature.