Construction sites are busy, hazardous places. Fences and security cameras help deter trespassers, but a method of jobsite access management is necessary to ensure that only authorized workers and visitors pass through entry points, and to generate a record of entrants. On large jobsites in particular, paper sign-in sheets at guard stations are simply inadequate. Worker ID badge scanning is a more rigorous method and provides a digital record of who entered the site and when. It leverages badges that are issued by workforce management companies and enabled with radio frequency identification (RFID), near-field communications (NFC) or Bluetooth low energy...