National Association of State Directors of Pupil Transportation Services (NASDPTS) Position Paper
In February 2014, the NASDPTS issued a revised position in support of lap-shoulder belts on school buses; it was titled, The Equipping and Use of Passenger Lap/Shoulder Belts in School Buses.
NHTSA—Guideline for the Safe Transportation of Pre-school Age Children in School Buses
Original NHTSA document on using child safety restraints on school buses for children below kindergarten age/size. Posted as a still-useful reference.
NHTSA—Choosing the Correct School Bus For Transporting Pre-School Age Children
The transportation of pre-school age children in school buses has increased significantly, and will continue to increase. Organizations providing pre-school transportation extend beyond traditional school systems to include child care and Head Start programs. Regardless of which organization is transporting pre-school age children, the goal of all is to do so safely. This NHTSA publication will help you select the type of school bus you need and determine the features and equipment necessary to allow you to transport safely your pre-school passengers.