A field experiment of workers' responses to proximity warnings of static safety hazards on construction sites

The experiment was conducted over 17 workdays with the participation of 72 workers and resulted in 5391 warnings on a real-life construction project in Shanghai, China. The workers' responses were analyzed with respect to two factors: building trades and a-priori risk levels. The research found that workers responded to proximity warnings actively, but slightly differently across the selected building trades; carpenters had longer response latency in hazardous areas than ironworkers did, and response percentages were high for hazardous areas with high risks. The results also show evidence that PCMS has the potential to improve workers' safety performance. The limitations of the present study and future research directions are also addressed.