This work presents a position monitoring system to generate displays showing the position of trains, time between trains, seconds early/late for each train, and alarms. Alarms will be generated when trains are too close, unexpected events are received, or trains do not cross subsequent sensors when expected. This system has been designed to run concurrently with the existing original system, which only illuminates LEDs on a large plastic board to indicate the segments that the trains are in. Currently, it is up to the operators to estimate times between trains by viewing the panel where lights are illuminated. The new system will greatly improve performance issues in addition to the safety issues. In accordance with the agreement between the Universidad de Guadalajara and the light rail system (SITEUR), the license for this project will be GPL and it will be available on sourceforge.net.

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