In SD They doesn't use letters like we do in Santiago... When in Caribe tours in SD just croos Av. 27 de Febrero, stand for a carro publico... ask the driver; Derecho or Duarte con Paris...When you get off at Duarte con Paris take another carro publico... Just ask = "Parque" they will run all the way down to reach Palo incado.. Get off at Parque Henrriquillo where most guaguas heading to the Est side of the Island makes turn...
If you are on a back pack you can walk from Duarte con Paris to Parque H. also.
JJ