To ESTRADA, as a term in regular use in Spanish, the definitions of the dictionary don't apply, as it is used only as a surname. However, in some parts of the Principality of Asturias, the Autonomous Community of Cantabria, Vizcaya, and the north-west of Spain, some of the definitions do apply in the dialects used by the local inhabitants.
estrada = road in Portuguese and in that language the textual definition does apply and is of common use.
However, the surname ESTRADA is of Spanish origin. A bit confusing to start with, but a fact that will be clarified as you read on.
Estrada is a toponimic surname, which means it derives from a place, being this a locality of varying size, from a hamlet to a big city.