SCOPE is an open source dual redundant traffic signal control environment that was funded by the U.S. Department of Transportation. SCOPE incorporates an open source traffic signal control program developed by Advanced Technologies, Incorporated. SCOPE has pre-timed and actuated control modes. In has min recall, max recall, gap out, max gap, and presence modes that include advanced traffic control concepts. SCOPE interfaces with both NEMA-TS2 and Intelligent Transportation Systems (ITS) traffic cabinets. SCOPE executes under Linux or Windows. Currently it runs on a Linux based PC (used for concept and unit testing), a PowerPC prototype board with various I/O connectors (used for integration testing) and an Advanced Traffic Controller. SCOPE has the ability to simulate 64 traffic sensors and 8 pedestrian calls. It has several menu options to facilitate real time logging and debugging. SCOPE is easily ported to any platform and has wireless Android Tablet / Java PC interfaces.