Seatbelts could become compulsory on all school bus journeys in Warwickshire.
County council members are considering ordering belts to be fitted to buses used to transport primary and secondary children to and from school - at an estimated cost of £1 million a year.
The money would have to be paid to the private operators.
Most of the companies, including Stagecoach, Travel West Midlands and Arriva, do not have seat belts on their vehicles and would face considerable costs in meeting Warwickshire's wishes.
A scrutiny committee recommendation to move to fully seat-belted trips will be considered by the cabinet today, although a critical report states that there is no evidence that the absence of seatbelts on a bus increases the likelihood of injury in the event of an accident.
The report warns that a decision to make seatbelts compulsory could rebound on the council with operators struggling to upgrade their vehicles.