a 60 minutes from Bavaro(very wide area) to the Jumbo in La Romana is possible but you have to drive fast, early morning/night without to worry about potholes in the street. the road throu the sugarcane i wouldnot recommend to anybody not local in the area, if you're stuck there with a car problem/tire damage you're really stuck without any assistance for a long time.
it also depends from where in the bavaro area you start the ride, if you drive from the area of the hotels Majestic, Bahia Principe, Gran Paradise, Barcelo Punta cana, then you would need 30 minutes on daytime only to cross bavaro and reach the crossing of Veron plus an other 40 minutes to reach an cross higuey, still the ride higuey -La Romana to go, an other 30 - 40 minutes.
Mike