Jefferson City, Mo. (AP) — The Missouri Senate has given initial approval to legislation making the length of yellow traffic lights more uniform across the state.

The bill endorsed Monday would have MoDOT establish standard times for yellow lights based on federal guidelines.

The Federal Highway Administration says a yellow light should last three to six seconds, depending on the speed of traffic at an intersection.

Sponsoring Sen. Jim Lembke, a St. Louis County Republican, says that under current law, cities with red-light cameras could shorten yellow lights to increase red-light violations and bring in more revenue from tickets. He says shorter yellow lights make roads more dangerous.

The measure must be approved once more before it goes to the House.