FMCSA raises bus tire blowout awareness

Posted on August 20, 2012

Following several recent incidents involving tire blowouts on passenger buses, the Federal Motor Carrier Safety Administration (FMCSA) is taking a closer look at the potential cause of these incidents.

In partnership with the National Highway Traffic Safety Administration (NHTSA), FMCSA has conducted preliminary investigations that show potential safety concerns related to double-deck buses that may overload tires outside the suggested weight limit. Under specific circumstances motorcoaches utilizing the double-deck design may be susceptible to exceeding the tire weight limit when loaded with passengers and luggage at full capacity. These risks can be avoided by properly loading passengers and cargo, and increasing pressure in tires on the rear wheels.

FMCSA released a Motorcoach Safety Advisory Bulletin to raise awareness of this issue within the bus industry and urge companies to take action to prevent potential safety risks.

"Safety is our top priority at the Department of Transportation," said U.S. Transportation Secretary Ray LaHood. "Travelers have a right to expect that their bus will be safe and well-maintained, and bus companies have a responsibility to make sure it is."

The Advisory Bulletin states that safe motorcoach operators should have policies and procedures in place to monitor the loading of their vehicles and take appropriate action, such as reducing passenger/cargo loads, distributing passengers throughout the bus or increasing tire pressure, to ensure that they remain within the allowable tire weight rating and state vehicle weight limits. FMCSA is working with state officials to increase enforcement of these important safety provisions of federal and state laws.

A tire on a motorcoach loaded beyond its weight rating, operated at highway speeds for a significant period of time, is more likely to overheat and fail, potentially placing the safety of passengers and other motorists at risk. FMCSA takes this issue very seriously, and bus companies or vehicles that violate tire loading restrictions may be declared an imminent hazard and immediately placed out-of-service.

FMCSA and NHTSA will continue to investigate the causes of motorcoach tire failures to ensure the traveling public's safety on this popular mode of intercity transportation.

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