US 11,867,519 B2
Weather and road surface type-based navigation directions
Yan Mayster, Mountain View, CA (US)
Assigned to GOOGLE LLC, Mountain View, CA (US)
Appl. No. 17/047,648
Filed by GOOGLE LLC, Mountain View, CA (US)
PCT Filed Oct. 15, 2019, PCT No. PCT/US2019/056194
§ 371(c)(1), (2) Date Oct. 14, 2020,
PCT Pub. No. WO2021/076099, PCT Pub. Date Apr. 22, 2021.
Prior Publication US 2023/0127182 A1, Apr. 27, 2023
Int. Cl. G01C 21/34 (2006.01); G06V 20/10 (2022.01); G06V 10/774 (2022.01); G01C 21/36 (2006.01)
CPC G01C 21/3453 (2013.01) [G01C 21/3667 (2013.01); G06V 10/774 (2022.01); G06V 20/182 (2022.01)] 14 Claims
OG exemplary drawing
 
1. A method for generating a set of navigation directions according to road surface types of road segments, the method comprising:
training, by the one or more processors, a machine learning model for identifying road surface types of road segments using (i) a plurality of images of road segments, and (ii) indications of road surface types for each of the plurality of images of road segments;
receiving, at one or more processors, a request for navigation directions for a vehicle from a starting location to a destination location;
identifying, by the one or more processors, a set of candidate routes for navigating from the starting location to the destination location;
for each road segment within each candidate route in the set of candidate routes, determining, by the one or more processors, a road surface type for the road segment, wherein the road surface type for at least one of the road segments is determined by:
applying visual features of the road segment to the trained machine learning model;
selecting, by the one or more processors, a route from the set of candidate routes based at least in part on the road surface types of the road segments within each candidate route; and
providing, by the one or more processors, a set of navigation directions for presentation on a client device for navigating from the starting location to the destination location via the selected route.