You know, after thinking about it, I'd rather have something with both left and right turns. Sure, you can get to the bottom and turn around, but I want to alternate directions with a few straight bursts in between. Just more fun.
That is NFG.. 1. It is in Japan and not sure if you know how they drive over there but you wouldn't want to be on that on a bike with cars going both ways and 2. WTF is the point? Go to a fugging parking garage in Detroit and get the same effect plus dodge many potholes for extra fun.. Sorry I just don't get it.. Twisties like the gap are much much better..
We use switchbacks here in Colorado to climb steep mountains, but some semi's can't use them. In Japan the volcanic rock may be too unstable to make sharp switchbacks, or the corkscrew just makes it much easier for semi trucks.