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2.4 GHz <br />M1020M1010 <br />VehicleRadio <br />ModuleUnit <br />Ethernet <br />M764 <br />PhaseSiemens Controller <br />Selector <br /> <br /> <br />The M1020 vehicle unit broadcasts its identity, GPS location, he <br />second to the M1010 radio unit at the intersection. The list of <br />M764 phase selector for evaluation. Using pre-programmed criteria, the phase selector determines the <br />approach channel and distance to the intersection. Using the rep <br />intersection is then calculated. <br />Again using pre-programmed criteria, the proximity is evaluated using both the distance and the ETA <br />against a list of thresholds for the approach on which the vehic <br />(high for EVP and low for TSP) is used to identify the appropria <br />one of these thresholds then a detector input is reported to the controller. <br /> <br />Centralized Authentication, Data Collection and Reporting <br /> <br />GTTs Central Management Software (CMS) in its current configurat <br />selector at the intersection to monitor preemption status, provi <br />maintenance and provisioning and extraction of call records from <br />current method of monitoring is via polling of the phase selectossing via <br />scheduled jobs and live access via a graphical user interface ar <br />Authentication is currently accomplished in the system via means <br />agency, class and ID of the vehicle unit as a key to access pree <br />intersection. Coding is available as static lists of code ranges <br />specified and via scheduled time plans that allow smaller sets o <br />specific times during the day. Up to 100 additional code ranges <br />The preferred medium for communication is via a TCP/IP network. <br />communications protocol to communicate with the phase selectors. City of La Porte EMS will install a <br />communications network for intersection to intersection connectireporting for <br />Houston Tran Star. <br /> <br />