Complex sentence: Controversy exists over the use of seat belts as a restraint system for school bus passengers; officials of the U.S. National Transportation Safety Board state school buses are safer than private automobiles even if they are not fitted with seat belts.
Split into simpler sentences: Controversy exists over the use of seat belts as a restraint system for school bus passengers. Officials of the U.S. National Transportation Safety Board state school buses are safer than private automobiles even if they are not fitted with seat belts.