US 11,941,978 B2
Deriving traffic signal timing plans from connected vehicle trajectory data
Justin Michael Neill, Woodburn, OR (US); Brandon Keith Sams, Fairview, OR (US); Jonah Aaron Pincetich, Portland, OR (US); Darryl Joseph Michaud, Portland, OR (US); Thomas Bauer, Beaverton, OR (US); and Jingtao Ma, Portland, OR (US)
Assigned to TRAFFIC TECHNOLOGY SERVICES, INC., Beaverton, OR (US)
Filed by TRAFFIC TECHNOLOGY SERVICES, INC., Beaverton, OR (US)
Filed on Sep. 17, 2022, as Appl. No. 17/947,106.
Application 17/947,106 is a continuation of application No. 17/173,096, filed on Feb. 10, 2021, granted, now 11,482,104.
Claims priority of provisional application 62/976,253, filed on Feb. 13, 2020.
Prior Publication US 2023/0013604 A1, Jan. 19, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. G08G 1/08 (2006.01); G08G 1/01 (2006.01)
CPC G08G 1/08 (2013.01) [G08G 1/0104 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method comprising:
selecting a subject intersection, wherein the subject intersection is a physical intersection controlled by electric traffic signals based on at least one timing plan;
acquiring vehicle trajectory data from a first datastore, the vehicle trajectory data archived over a sampling period of time;
acquiring MAP data that defines detailed geometries of the subject intersection;
filtering the acquired vehicle trajectory data to form a trajectory dataset of vehicle journeys near the subject intersection;
applying clock drift adjustments to a date/time stamps of the vehicle trajectory data to form a corrected trajectory dataset;
analyzing the vehicle journeys based on the MAP data to identify stopline crossings at the subject intersection during the sampling period; and
determining, based at least in part on the stopline crossings and the MAP data, a first timing plan of the subject intersection.