A Construction Accident Prevention System Based on the Internet of Things (Iot)

•Radio frequency identification (RFID) has been leveraged to proactively prevent accidents on construction sites.•Proximity detection empowered by the RFID is highly flexible for creating various detection zones by programming the devices.•Semi-passive tags (EPC UHF Gen2) have been employed to identify and warn trespassers.•A long-range wireless communication system enabled by LoRa is able to deliver the data to a remote server.•The RFID subsystem shows 100% successful detection rate, and the wireless network can efficiently disseminate the information to the server for safety management and data analytics.