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METHOD FOR REGIONAL SYSTEM WIDE OPTIMAL SIGNAL TIMING FOR TRAFFIC CONTROL BASED ON WIRELESS PHONE NETWORKS

  • US 20030014180A1
  • Filed: 07/10/2001
  • Published: 01/16/2003
  • Est. Priority Date: 07/10/2001
  • Status: Active Grant
First Claim
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1. The system for controlling and adjusting phase timings at all signalized intersections within a given geographical region with the purpose of allocating more green light time for roads with heavier traffic flows at the expense of less loaded roadways comprising the steps of:

  • acquiring of dynamic traffic information from a cellular network provider or a group of cellular network providers and from GPS based technology whenever available for the purpose of monitoring movements of as many traveling vehicles in a given region as possible;

    continuously or periodically obtaining location data on plurality of cell phones in the regional network in a specific real time frame;

    determining for each particular cell phone whether the cell phone terminal is located in a traveling vehicle;

    setting up a list of all cell phones currently identified as located in traveling vehicles;

    compiling and updating a sequence of real time positions of each cell phone located in a traveling vehicle;

    positioning each cell phone located in a traveling vehicle onto an appropriate road section at each particular moment according to its coordinates;

    eliminating untenable cell phone positions (outlying positions) by analyzing series of recently recorded positions and relating them to nearby road sections;

    making imputations for missing cell phone positions by analyzing series of recently recorded positions and relating them to nearby road sections;

    calculating feasible continuous paths for all cell phones located in traveling vehicles within a given time period;

    identifying multiple phones in a common vehicle and combining them into a single vehicular cluster entity based on closely located positions at corresponding time moments and common direction of movement;

    calculating feasible continuous paths for vehicular clusters within a given time period;

    storing the relevant position data for each individual vehicle (vehicular cluster) traveling along a given road section in the database for the purpose of maintaining vehicle'"'"'s recent path information.

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