Abstract
The construction industry is among the most dangerous industries, as one in five worker deaths is related to construction job sites. Construction project are unique in nature with different rationales and requirements. There are safety issues within each step of the construction phase at each project. This study aims to include factors of uncertainty such as performance of construction workers and their state of alertness in their work conditions in response to external stimuli. To address the relationship between human factors and safety concerns at job sites, an exploratory study was conducted to evaluate which factors impact a worker's perception of the jobsite and how these factor can be used to predict and decrease jobsite accidents. This study is a multidisciplinary project and combines three different domains including construction management, constructions safety, and cognitive phycology, to evaluate workers' perceptions of safety and will pave the way for the further implementation of mental alertness measures at construction projects.