Bus stops in La Romana
Both of the bus companies that run Santo Domingo-La Romana route stop at their main terminals on the western edge of town. One is right next to the Burger King and one is right across the street from the Baseball stadium- they are on the same main road/street. BUT, most passengers choose their unique service of running through town, down to the main plaza, where you can catch a bus to Higuey. You just tell the driver where you want off at. I am not sure where the Bayahibe guaguas run from but I imagine it's around the plaza.
happy travels