Autovía A-50
Encyclopedia
The Autovía A-50 is a highway of approximately 100 kilometers in central Spain
Spain
Spain , officially the Kingdom of Spain languages]] under the European Charter for Regional or Minority Languages. In each of these, Spain's official name is as follows:;;;;;;), is a country and member state of the European Union located in southwestern Europe on the Iberian Peninsula...

 between Salamanca
Salamanca
Salamanca is a city in western Spain, in the community of Castile and León. Because it is known for its beautiful buildings and urban environment, the Old City was declared a UNESCO World Heritage Site in 1988. It is the most important university city in Spain and is known for its contributions to...

 and Ávila.

Because it is not the doubling of the N501 it replaces, it is build as a new road, so you can not value it as an upgrade of the N501.
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