The original function of seatbelts was to re- strain only adult-size occupants, and some belt- assembly design parameters are in conflict with those that would best secure CRs. These param- eters include belt anchor location, buckle size, and type of retractor and latchplate. These and other issues regarding child restraint compatibility with vehicle belts and seats are addressed in an SAE Recommended Practice (SAE J1819, 1994). 105 Unfortunately, however, not all products comply with this voluntary standard, nor have all prob- lems been solved. Tight installation with a seatbelt continues to be difficult to achieve in many cases
