Convenient, cheap but less safe than the buses. The share-a-taxis are popular among capitaleños (people from Santo Domingo). You might have seen them: a typical car with the driver, 2 people on the front seat and 4 on the back. They'll travel the same route back and forth and will pick up and drop off passengers wherever (although not in the middle of the street ;)). Because their routes are shorter they're more expensive than the buses if you travel a distance as long as the buses. Good for a short ride from point A to point B. When you want the driver to stop so that you can get off, say "déjame" (de'hahme, sort of).