Safety performance differences between unionized and non‐union motor carriers

This paper analyzes the safety performance differences between union and non‐union motor carriers. Based primarily on the safety and health provisions of a national agreement between the International Brotherhood of Teamsters and a major unionized motor carrier, a hypothesis is developed that union carriers have a positive safety impact. The hypothesis is tested using safety performance data. Key findings are that union membership has a statistically significant positive impact on both driver and vehicle safety performance. Union membership results in significantly fewer crashes as well.