This project developed and tested prototype devices and methods to detect and identify radioactive material carried into rail rapid transit systems. A prerequisite for the early response and interdiction of such material is the detection and tracking of its location. It is necessary to have the ability to monitor the ambient radiation environment so that in the event of a radioactive device or dirty bomb, emergency response units will have as much information as possible. This project included development, laboratory proof of concept, and prototype testing of the radiation detection system to address this problem.  View Report