NTSB identifies failures in road maintenance leading to deadly Texas crashes.

The National Transportation Safety Board (NTSB) has found that the company responsible for maintaining a Texas interstate where 130 vehicles crashed in icy conditions two years ago, killing six and injuring dozens, failed to address the deteriorating road conditions. The NTSB said that the failure of North Tarrant Express Mobility Partners Segment 3 to address the conditions contributed to the crash, as did drivers' speeds. The recommendations from the NTSB include the installation of variable speed limit signs, adding sensors to reduce response times to hazardous road conditions, and providing training on how to better respond to winter weather conditions.