Ronda de Dalt (common name) orB-20 motorway is aring road or beltway withinBarcelona and other parts of itsmetropolitan area, running froml'Hospitalet de Llobregat, toNus de la Trinitat in theSant Andreu district of Barcelona. It was completed in 1992 on the occasion of the1992 Summer Olympics. Parts of the road are completely underground whereas some other look pretty much like other thoroughfares in the city.