From Santo Domingo to Santiago, good.
From Santiago To Navarete, Good.
From Navarete to Esperanza, OK, ( one lane each way)
From Esperanza to Laguna Salada, Not good.
From Laguna Salada to Cruse Guayubin OK.
You now have to options.
Guyubin to Pepillo Salcedo ( Not good, lots of holes )
Cruce Guayubin To Montecristi, it's OK
Montecristi to Pepillo Salcedo, It's OK