Safety in construction is paramount, yet the U.S construction sector remains one of the most hazardous work environments among industrial segments. Visibility-related issues, often involving construction equipment and pedestrian workers, cause approximately a quarter of all construction fatalities. The TRB IDEA (Innovations Deserving Exploratory Analysis) Program’s NCHRP IDEA Final Report for Project 226: A Smart IOT Proximity Alert System for Highway Work Zone Safety involves the development and validat…