The horrific bus accident that took place on Interstate 40 between Knoxville and the North Carolina / Tennessee border gives rise to lots of questions. The media has indicated that a bus tire failed, resulting is a loss of control that in turn resulted in the bus going through a wire median barrier and into oncoming traffic. The bus then collided with an SUV and a tractor trailer.
One question that will be explored is whether the wire median barrier should have prevented the bus from going into oncoming traffic. Wire median barriers, also called cable barriers or safety cable barriers, are installed in medians. The cables are installed on metal posts. The barriers are intended to stop, slow down or redirect vehicles which strike them.
Safety barriers are tested in accordance with National Cooperative Highway Research Program Report No. 350.