Traffic density is low in most parts of the Dominican Republic, and driving is really no problem, however we want to give you some advice for your fun and for your safety:
a red flag means there a animals on the road. Take care, and pass the flock of cows or whatever it is, very slow and careful.
in the dark, you should not drive on an unknown road. Even a road that is in good condition in general, might have some damages and holes in some places !
drive defensively, never insist on the right of way !