Missouri’s traffic laws are odd in one respect. Motorists are required to wear seat belts but they can’t be pulled over solely for failing to put them on.

State lawmakers should change that by passing a “primary” seat belt law. State officials say the resulting stiffer enforcement would result in more people buckling up, saving an estimated 90 lives and reducing injuries by about 1,000 every year.

“You can be pulled over for a burned-out license-plate light, but not for endangering your life and the lives of others by driving without a safety belt,” said Pete Rahn, director of the Missouri Department of Transportation.

The last attempt by MoDot to win approval of a primary seat-belt law went nowhere. Opponents said whether to buckle up should remain a driver’s decision.

Yet wearing a seat belt is already required. A primary law would simply allow police officers to pull over law-breakers solely for that infraction.

Some 76 percent of Missouri drivers currently use seat belts, well below the national average of 83 percent.

If a primary law is passed, the state would gain $16 million in additional federal highway money to use for safety enforcement, education and engineering. But this year is the last year that money will be made available.

Lawmakers should not allow this year’s money to vanish. It’s time Missouri joined the 26 states with primary seat-belt laws.