Ever since I found out about this road many years ago I knew that if I ever came to Maui, then I would have to drive it. It is one of the curviest roads in the world with over 600 curves in less than 50 miles. The actual twisty section is only about 34 miles with 59 bridges (46 of which are single lane), and around 34 waterfalls.
you can read more information about the Hana Road HERE
It is the perfect road for a 2-wheeled vehicle but other than tourists who rent bikes while they are here on vacation I don't see many bikes, but there are lots of 49cc scooters . I mean why would you own a sport bike or a V-strom when there is only one main road which gets repetitive after a while.
From all the literature we have read the Road to Hana was described as an all day affair, taking at least 2-1/2 hours, or if there is lots of traffic . . . closer to 4 hours each way to drive the mere 50 miles. The road is narrow with narrow lanes and most of the 59 bridges are one-lane, having to yield to oncoming traffic at most curves. The posted speed often crawls to 10 or 15 mph. The road is not conducive to taking photos as there are few places to pull over and you can't stop in the middle of the road since there are too many curves.