Spatial Positioning On Transit™ (SPOT™) is ETA Transit Systems' flagship product. SPOT™ is a cutting-edge ITS Transit Management system that is built on open standards, and a Web Services Open Architecture (WSOA). SPOT™ finally brings interoperability to this industry, easily integrating with existing central office systems, Positive Train Control (PTC), health monitoring systems, diagnostic systems, automatic fare collection, maintenance management systems, ITS signal prioritization, video surveillance, advertising, infotainment and interactive voice response systems.