NHTSA
Sends School Bus Report to Congress
Noting
that school bus transportation is one of the safest forms of transportation in
the United States, the U.S. Department of Transportation’s National Highway
Traffic Safety Administration (NHTSA) today sent to Congress a new report
assessing occupant protection in school buses.
Every
year, the nation’s 450,000 public school buses travel more than 4.3 billion
miles to transport 23.5 million
children to and from school and school-related activities, the agency said.
In
comparison with other forms of transportation, the report shows that students
are nearly eight times safer riding in a school bus than in cars. The fatality
rate for school buses is 0.2 fatalities per 100 million vehicle miles traveled (VMT)
compared to 1.5 fatalities per 100
million VMT for cars.
This
safety record is a result of the Department of Transportation’s requirements
for compartmentalization on large school buses, and lap belts plus
compartmentalization on small school buses.
Compartmentalization is the name for the protective envelope created by
strong, closely-spaced seats that have energy-absorbing high seat backs that
protect occupants in the event of a crash.
The
new NHTSA report concluded that requiring lap belts on large, new school buses
would appear to have little, if any, benefit in reducing serious-to-fatal
injuries in severe frontal crashes. In rare circumstances, tests indicate that
in some severe frontal crashes there may be increased risk of serious neck
injuries and possibly abdominal injury among young passengers wearing lap belts.
In
small school buses, any increased risks associated with the use of lap belts are
more than offset by preventing ejections. These
buses weigh less, have different crash dynamics, and are more prone to rollover
than large school buses.
The
use of combination lap/shoulder belts, if used properly, could provide some
benefit on both large and small school buses.
Lap/shoulder belts can be misused if children put the shoulder portion
behind them. NHTSA’s testing
showed that serious neck injury and perhaps abdominal injury could result when
lap/shoulder belts are misused. Assuming
100 percent usage and no misuse, lap/shoulder belts could save one life a year.
Lap/shoulder belts also could reduce school bus capacity by up to 17 percent because of seat redesign, and add between $40 and $50 per seating position to the cost of a new vehicle. The most popular buses carry between 60 and 71 passengers. The total annual cost would be over $100 million.
Other
considerations, such as increased capital costs, reduced seating capacities, and
other unintended consequences associated with lap/shoulder belts could result in
more children seeking alternative means of traveling to and from school. Given
that school buses are the safest way to and from school, even the smallest
reduction in the number of bus riders could result in more children being killed
or injured when using alternative forms of transportation.
In this context, NHTSA recommended that, if states and local school
districts decide to require lap/shoulder belts on school buses, they should
ensure that no passengers are forced to find alternate means of transportation.
Some states and local school districts have voluntarily installed lap belts in their large school buses. NHTSA continues to recommend that, if states or local school districts require seat belts on school buses, they should ensure that passengers wear them correctly. States and local school districts considering purchasing seat belts for large school buses should be aware of the results of this new NHTSA research report.
Over
the past 11 years, school buses annually have averaged about 26,000 crashes
resulting in 10 deaths – 25 percent were drivers; 75 percent were passengers. Frontal crashes account for about two
passenger deaths each year.
Meanwhile,
NHTSA is continuing its research program, focusing on side impact protection,
working with university-based researchers to further study school bus
crashworthiness.
The
four-year research effort by NHTSA has pinpointed other improvements that could
be made to improve the safety of school buses.
The agency is considering the following changes to existing federal
safety regulations:
Increase
seat back height from 20 inches to 24 inches to reduce the potential for
passenger override in the event of a crash.
Require
buses under 10,000 pounds to have lap/shoulder restraints.
Currently, passenger seats on these buses must be equipped with lap
belts only. The agency also
will consider seat redesign so the lap/shoulder belts fit correctly for all
passengers aged six through adult.
Develop
standardized test procedures for voluntarily installed lap/shoulder belts.
A
copy of the full report can be viewed on the agency web site:
http://www-nrd.nhtsa.dot.gov/departments/nrd-11/Crashworthiness.html
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