Jdl,
Welcome to DR1, your 'everything you want to know about the DR' message board.
There are a few ways to do this and a lot has to do with how many people we are talking about, how much luggage is involved and how much you are willing to spend. The trip to Romans is about a 4 1/2 hour trip, assuming Romana is where you want to go and not the Romana airport.
The person that posted above is a taxi driver and that will be the most expensive means of transportation for you other then flying. I will also forewarn you that taxis charge outrageous prices for this trip in comparison to something such as a bus.
Rick