Motorcoaches typically cost between $350,000 and $500,000, according to the bus association. Seat belts would add about $3,000 to the price of a new, 54-passenger bus, according to the safety administration.
The agency said an average of 21 people in such buses are killed each year in crashes, and thousands more are injured annually. The agency said seat belts could reduce fatalities and moderate-to-severe injuries by nearly half.
Federal accident investigators first recommended motorcoaches be equipped with seat belts in 1968 in response to a California highway crash that killed 19 passengers.