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Accident Report Detail

 
Truck-Tractor Semitrailer Median Crossover Collision With Medium-Size Bus on Interstate 35, Davis, Oklahoma, September 26, 2014

Executive Summary

​On September 26, 2014, about 9:05 p.m., a 2013 Peterbilt truck-tractor in combination with a 2014 Great Dane semitrailer, operated by Quickway Transportation Inc., was traveling north in the left lane of Interstate 35 (I-35), near Davis, Oklahoma. About the same time, a 2008 Champion Defender 32-passenger medium-size bus—transporting 15 members of the North Central Texas College (NCTC) softball team—was traveling south in the right lane of I-35. The college owned and operated the bus.

In the vicinity of milepost 47, after negotiating a slight rightward curve at a speed of about 72 mph, the truck-tractor departed the left lane and entered the 100-foot-wide depressed earthen median at an approximate 2 degree angle. The truck-tractor continued through the median, traveling over 1,100 feet without evidence of braking or steering. The combination vehicle then entered the southbound lanes of I-35 at an approximate 9 degree angle and collided with the bus.

Following the impact, the bus rolled onto its right side, and the truck-tractor continued off the roadway into a wooded area. As a result of the crash, four passengers on the bus were fully or partially ejected and died, and both drivers and the remaining passengers were injured.


Probable Cause

​The National Transportation Safety Board determines that the probable cause of the Davis, Oklahoma, crash was the failure of the truck-tractor driver to control his vehicle due to incapacitation likely stemming from his use of synthetic cannabinoids. Contributing to the severity of injuries were the lack of restraint use by the bus passengers and the lack of appropriate crashworthiness standards for medium-size buses.


Accident Location: Davis , OK USA  
Accident Date: 9/26/2014
Accident ID: HWY14MH014

Date Adopted: 11/17/2015
NTSB Number: HAR1503
NTIS Number: PB2016-100022