Patent Document ID: 20030014180
Application ID: 09901823
Patent Status: 0

Claim One:
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.