Lawmakers in Annapolis are taking up legislation that would require seat belts on public school buses.

The move comes in the wake of a number of school bus crashes in Maryland and across the country.

According to the National Highway Traffic Safety Administration, statistically, school buses are the safest way to get kids to school -- safer than walking and safer than riding in their parents' car. A bill proposed in the General Assembly would add an extra layer of protection.

Seat belts aren't currently required on public school buses, leaving children to bounce around unsecured in the steel cage of a yellow bus during a crash.

Sen. Jim Brochin, D-Baltimore County, is shepherding legislation that will phase-in seat belts on school buses.

"When a school bus has had its lifetime of 14 or 15 years, or how many hundreds of thousands of miles you are allowed to have on it, when you are ordering the next bus, then that next bus has to have seat belts," Brochin said.

One of many reasons why public school buses aren't required to have seat belts is because of a concern that children will become trapped.

"If the bus goes under water into a lake or pond, if the kids are strapped in, it will be tougher for them to get out. Actually, more lives could be lost," Brochin said.

According to state education officials, the cost to local jurisdictions for installing a three-point lap and shoulder seat belt is $7,500 per bus. If the district chooses to include toddler seat belts, the price goes up to $9,800 per vehicle.

"I think soon, one day, the new buses may just have seat belts on them. We hope to get to that day," Brochin said.

Six states require seat belts on school buses. Maryland's proposed law, modeled in part after Florida's law, would exempt bus drivers of liability if students refused to wear the seat belts or unbuckled at some point during the ride.