	US 12,424,089 B2
	System and method for connected vehicle-based advanced detection of slow-down events
Yasir Khudhair Al-Nadawi, Ann Arbor, MI (US); Laith Daman, Novi, MI (US); and Hossein Nourkhiz Mahjoub, Ann Arbor, MI (US)
Assigned to Honda Motor Co., Ltd., Tokyo (JP)
Filed by Honda Motor Co., Ltd., Tokyo (JP)
Filed on Mar. 30, 2022, as Appl. No. 17/708,531.
Claims priority of provisional application 63/235,923, filed on Aug. 23, 2021.
Prior Publication US 2023/0053674 A1, Feb. 23, 2023
Int. Cl. G08G 1/01 (2006.01); B60W 40/105 (2012.01)

CPC G08G 1/0141 (2013.01) [B60W 40/105 (2013.01); G08G 1/0133 (2013.01); G08G 1/0145 (2013.01); B60W 2554/4041 (2020.02); B60W 2554/4049 (2020.02)]

20 Claims

1. A computer-implemented method for detecting a traffic event on a roadway, comprising:

receiving vehicle data from a plurality of vehicles travelling along the roadway, wherein the roadway is discretized at a cell level into a plurality of cells;

dynamically adapting a length of each cell of the plurality of cells based on traffic conditions of the roadway;

identifying vehicles of interest that are within a communication range of a host vehicle, wherein each of the vehicles of interest is associated with a cell of interest from the plurality of cells;

for each cell of interest across a plurality of timesteps according to a measurement update interval, calculating an average deceleration based on vehicle data transmitted from each of the vehicles of interest associated with the cell of interest;

setting a traffic speed flag sequence including traffic speed flags for each cell of interest at each timestep of the plurality of timesteps based on the average deceleration;

applying a predefined time window with a predetermined length to smooth the traffic speed flag sequence to generate a smoothed traffic speed flag sequence; and

detecting a traffic event based on the average deceleration and the smoothed traffic speed flag sequence for each cell of interest at each timestep of the plurality of timesteps.