This document is the May/June 2016 issue of Transportation Builder, the official publication of the American Road & Transportation Builders Association (ARTBA). The issue focuses on transportation construction safety. It includes articles on ARTBA's new safety certificate training course, innovations in mobile barriers that provide positive separation for workers, and using technology to detect and repair potholes. The chairman's letter expresses ARTBA's continued commitment to transportation worker safety and previews a major new safety initiative to be announced at the upcoming ARTBA National Convention.