Reviewing a road is pretty funny to me! (Though I could review Hwy 61 -- near Bob Dylan's homeland...)
For my husband and me, Hwy 997 is the way to get from our rental casa to just about everywhere else! "Everywhere else" generally means the BEACHES to us. It's our "short-cut", our "Main Street", instead of going to 200, then to 201, from where we stay in el barrio Los Chivos. Actually, 997 does go from Isabel II on the north into Esperanza on the south coast, so it really is the main street. And it's paved all the way! That is not to say there aren't plenty of potholes!
En route to 997, the streets are SUPER-NARROW in the neighborhoods/barrios: extremely tricky when there's a car coming from the other direction -- and folks don't slow down! I finally got my husband (the driver) to look to his right or left where there's an intersection or drive-way: took about 10 days of our 14 days on this trip! (Our fifth, I think.) We've named one turn "Sleeping Dog Corner" (La Esquina de los Perros Dormiendo) -- because about 3 dogs lie in the road -- and they do not move for cars: just navigate around them! Then there's the house with the "guard-roosters" who start their ruckus when we pass by. After a few days, one gets to know the potholes, where we say "mind the dip," a la "mind the gap," which we picked up in St. Lucia on our only trip there -- before we "discovered" Vieques, the only island we now visit.
My husband likes to coast down from a certain point where we enter 997 (from the local road) to the entrance of Camp Garcia Road ("our" beaches are on it). We like noting the never-completed "Sports Complex": each year it's less visible because of all the overgrowth. At this point in time, you just have to know it's there. Near this part of 997 is a passing lane, as the road is steeper than at any other point.
However, there is one very important location on 997: Colmado Mambo, in el barrio Destino This little grocery store/bar is open late (11ish) and has all sorts of things the Morales markets (SuperDescuento on Hwy 200 and the Morales in Isabel II) don't have; eg, half and half, local medicinal remedies, Caladryl, video-poker and all kinds of goodies. Oh, and the hospital is on 997, too!
It's narrow at most points, and people park or stop wherever, so drive with great caution -- as on all roads. Of course, horses, dogs, roosters and occasional weasels and iguanas have the right of way -- and they all go at their own paces. It's a fine road and the most convenient one for going north/south on Vieques. Of course, it's "scenic": it traverses Vieques!