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Home » Could a dropped Thermos bottle have caused deadly bus accident?
Only on the WebToday's NewsTransportation Safety

Could a dropped Thermos bottle have caused deadly bus accident?

bus-900.jpg
February 25, 2019
KEYWORDS accident investigation / motor vehicle accident / traffic accident
Reprints

A dropped Thermos bottle lodged between the brake and accelerator pedals could not be ruled out as a possible cause for the fatal 2017 collision between two buses in Flushing, New York, according to a report released by the National Transportation Safety Board (NTSB).

Speeding bus hits another bus

On Sept. 18, 2017, at 6:16 a.m., a motorcoach operated by Dahlia Group Inc. collided with a New York City Transit Authority bus at the intersection of Northern Boulevard and Main Street in Flushing. The motorcoach was traveling 60 mph — twice the posted speed limit — when it struck the left rear side of the transit bus, causing the transit bus to rotate 120 degrees and then strike two parked cars. The motorcoach driver, a passenger on the transit bus and a pedestrian were killed.

NTSB investigators used data from telematic systems on the motorcoach and the transit bus and security video footage to establish the timeline of events, including respective vehicle location tracking, lane positions, and pre-crash speeds. The investigation was aided by a GPS device on the motorcoach which provided video and audio from its forward facing camera.

A "metal rattling noise" is a clue

The motorcoach was traveling at 30 mph when a metal rattling noise is heard on the audio recording. Three seconds after the metal rattling sound the driver utters a single-word remark as the motorcoach increases its speed. More audible metal rattling sounds are recorded from inside the cabin. Three seconds after the first exclamation the driver exclaims a second time as he approaches the accident intersection and swerves to avoid stopped vehicles. This steering maneuver is the only known action the driver takes after experiencing unintended vehicle acceleration. Vehicle data show no brake application. The motorcoach enters the Main Street intersection at 60 mph.

Investigators found no evidence that the motorcoach driver’s experience, training, route familiarity or pre-crash activities were factors in the collision. The GPS recording indicates the motorcoach driver was conscious and aware of the hazardous conditions preceding the crash but was unable to control the vehicle’s speed. Security camera video of the crash shows no illumination of the motorcoach brake lights before impact, but no mechanical or operational issues were found with the motorcoach. NTSB investigators ruled out a deliberate intent by the driver to crash his vehicle.

The driver's wife said...

NTSB investigators then considered the possibility that an object became lodged beneath or between both the brake and the accelerator pedals, resulting in uncontrolled acceleration and the inability to apply the brakes. At the scene of the crash, investigators found a metal Thermos bottle near the control pedals. The Thermos could potentially explain the metal rattling heard on the audio recording. The driver’s wife said he had taken his Thermos for the trip.

Investigators examined the audio to determine if a dropped Thermos could have created the sound, but the results were inconclusive. Metallurgists from the NTSB Office of Research and Engineering examined marks on the Thermos to determine if they could have been caused by contact with the vehicle control pedals, but no physical evidence was found. Investigators also obtained a similar Thermos and attempted to lodge it in the pedals of an exemplar motorcoach. They found that it was possible to position the Thermos beneath and between the pedal controls such that it prevented brake application while depressing the throttle.

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