How many curves the stretch holds. Over lengthInMeters, it says how winding the stretch is.
The curvinessScore of its curves, added up: the higher, the more a rider gets out of it.
Roadcurvature.com, which scores roads the same way, calls those over 1000 very twisty.
How many of its curves are hairpins, as isHairpin tells them.
The length of the stretch, along the route.
The radius of the stretch's tightest curve.
The SDK groups the route's curves into stretches, with getCurvyStretchSections. To list
the curves of a stretch, pass it as within to getSectionsWithin.
A curve at a maneuver ends a stretch, since a run of turns at junctions makes no winding road. That takes a route with guidance: without it, turns at junctions between short roads can make one.
A curvy stretch of a route: curves that follow one another closely, such as a mountain pass.