AgusQui, 
I wonder if you have older imagery? I have imagery that shows Avenida exists where you removed it. And while Avenida might be not be signed on one block, it will be on the next- it is intermittently signed Avenida. Also "Avenida" isn't confined to only existing on dual carriageways. 
I encourage you to consider adding Avenida back to the rest of Mariano Acosta based on what's in our imagery. 
Our imagery is currently being uploaded to Mapillary and will be available soon. 

Let me know if you have any other questions!
