Communication is key to a safe and productive construction environment.  One of the biggest challenges of effective communication on job sites is the complexity and size of the project, which inhibits being able to contact the correct people in a timely manner.  Tracking devices have been a hot button issue in construction news for the last few years.  Some examples include RFID tag sensors in hard hats, such as the one being used on certain job sites in Washington DC and time sheet applications, which allow employers to track their employee’s locations using the GPS on their phone’s or tablets.