They do, at least the newer models built for New Jersey schools.

They've always felt them unnecessary up until recent years.

cost was the first and foremost issue. as it was with air conditioning.

I would think that it would be almost impossible to get all the kids to wear them.

You can't honestly expect the bus driver to be responsible for getting all the kids to buckle up.

Because if there is an accident it would take way too long for the one adult that is normally on the bus to get everyone out.

They do in some states, in NY State every school bus has to have seat belts, however kids do not have to wear them unless the district or county the school is in designates they have to be worn, in NYC and two or three other locals in NY they have to be worn. The reason is there has not been proof whether it is safer for kids to wear belts or not in the event of a major accident. The fact that wearing seat belts would make the job easier for school bus drivers is not taken into the mix when making this decisian.