office of highway safety mexican hat, utah motorcoach overturn january 6, 2008
TRANSCRIPT
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Office of Highway Safety
Mexican Hat, Utah Mexican Hat, Utah
Motorcoach Overturn
January 6, 2008
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Office of Highway Safety
Introduction Introduction
Pete Kotowski, IIC
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IntroductionIntroduction
• Sequence of events• Vehicle speed• Safety issues• Investigative/support staff• Parties to investigation
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Charter TripCharter Trip
• 17-motorcoach charter• Ski trip excursion to Telluride,
Colorado• Trip originated in Phoenix, Arizona,
January 3, 2008• Scheduled to return January 6, 2008
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Accident TripAccident Trip
Lizard Head Pass
Missed turnAccident location
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Accident TripAccident Trip
• Departed Telluride, Colorado, at 3:15 p.m.
• Removed tire chains outside Telluride• Driver missed turn • Continued straight on Utah
U.S. Route 163• Accident occurred at 8:02 p.m.
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Guardrail impact
Off roadway
Source:Utah Highway Patrol
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Accident DescriptionAccident Description
• Roof separated from motorcoach during rollover sequence
• 51 of 53 occupants ejected
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Accident DescriptionAccident Description
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DriveCam IIDriveCam II
• Motorcoach equipped with a video recording device
• Forward-facing view• Rear interior view• Acceleration and turning forces
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DriveCam IIDriveCam II
• Forward-facing view of the motorcoach as it approached curve
• Motorcoach moves right of center line
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VIDEOVIDEO
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Vehicle SpeedVehicle Speed
• RE staff developed a video analysis program–Referenced points–Time of video image
• Speed determined to be 88–92 mph
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Vehicle SpeedVehicle Speed
Video forward view
Plotted position
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Vehicle SpeedVehicle Speed
• Vehicle Dynamics Study• Acceleration Study• Critical speed of curve• Gear ratio considerations• ECM operation and data
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Vehicle SpeedVehicle Speed
• Motorcoach traveling south entering curve at real speed and positions
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SimulationSimulation
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Safety IssuesSafety Issues
• Driver fatigue and excessive speed
• Hours-of-service violations and motor carrier trip planning
• Motorcoach occupant protection
• Emergency medical notification and response with regard to large buses traveling on rural roads
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On-Scene Investigative StaffOn-Scene Investigative Staff
Ron Kaminski Survival FactorsJim LeBerte Motor CarrierBurt Simon (Ret.) Human PerformanceLarry Yohe (Ret.) Vehicle FactorsDave Rayburn Highway FactorsMichele Beckjord Survival/InterviewsChris Voeglie Vehicle RecordersPaul Sledzik Transportation Disaster AssistancePete Kotowski Investigator-In-Charge
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Report Development StaffReport Development Staff
Dennis Collins Human PerformanceDan Horak, PhD Vehicle PerformanceBruce Coury, PhD Transportation
Research Analyst Doug Brazy Recorders Lab Jim Wildey (Ret.) Materials LabMitch Garber, MD Medical Officer
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Report Development StaffReport Development Staff
Kris Poland, PhD BiomechanicsJulie Perrot RecommendationsRobert Dodd, PhD Safety StudiesBridget Serchak Public Affairs
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Report Development StaffReport Development Staff
Debbie Taylor Writer-EditorAvis Clark VisualsDeborah Bruce, PhD Project Manager
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Parties to the InvestigationParties to the Investigation
• Utah Highway Patrol• Utah Department of Transportation• Federal Motor Carrier Safety
Administration• Motor Coach Industries• Busco, Inc. (dba Arrow Stage Lines)• San Juan County, Utah
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