TLDR : Google map dosen't tracking all the dents and cavities in the road.
That's a problem a startup focus on and trying to solve only use the sensors in user's phone.
Its algorithm observes changes in your vehicle’s speed and sudden dips and jumps to determine if a road has potholes in certain places.
pothole : (도로에) 움푹 패인 곳
hone : V. 연마하다 갈다
dent : V. 움푹 들어가게 만들다, 찌그러뜨리다
cavity : N. 구멍
팟홀?