Abstract: Advantageous systems and methods are provided for tracking the transportation of passengers. In general, the systems and methods utilize GPS signals associated with each of a passenger and a transportation vehicle to determine at least one of: (i) a start point for the passenger traveling via the transportation vehicle and (ii) an end point for the passenger traveling via the transportation vehicle. The determination of the start and/or end points for the passenger traveling via the transportation vehicle may advantageously facilitate ticketing, e.g., by automatically validating/calculating trip cost, trip duration, trip distance, etc.