The construction industry is one of the most dangerous industries when it comes to safety andsituations involving collisions between vehicles and workers are often fatal. Site activities are carriedout simultaneously by skilled workers and machine operators, which makes communication betweenthese groups crucial. Based on a single case study, the aims of this paper are to investigate: (i)problems related to communication on construction sites and (ii) the usefulness of Bluetooth headsettechnology to improve communication. In the first research phase, three semi-structured interviewsrevealed problems related to communication. Respondents identified improvement areas such assound isolation in vehicles, making it difficult to hear, and problems with using sign language whenit is dark or too sunny. Working together with the same person on a regular basis improvescommunication as well as safety and productivity, and interviewees suggested that inexperiencedpersonnel should be mixed in groups with more experienced personnel, which can help them to avoidinjuries and learn safer practices. In the second research phase, Bluetooth headsets were introducedto improve communication between different groups. Data was collected through five rounds of miniquestionnaires with construction site personnel. Feedback from each survey was used to improve theusefulness of the Bluetooth headsets. Analysing patterns from respondents’ suggestions, showed thatthey first complained about the fit and comfort of the headsets, followed by noise isolation,frequency and other additional functions of the headsets. The possibility to add warning signalsenhance the usefulness of Bluetooth headsets, e.g. by increasing the situational awareness andreducing cognitive load of construction workers, making workers more productive while also helpingto avoid injuries.