The VG-20 is a Spain dual carriageway, essentially a free dual-lane highway. It serves as the second bypass (Segundo Cinturón) road circling Vigo in the province of Pontevedra.
A tunnel under construction under the Park of Castrelos will join Avenida De Madrid (the main entrance to the Center of Vigo from the East) with the First Belt.
VG-20 loops around the south of Vigo, connecting the BouzasâÂÂCastrelos segment (the First Belt) to the APâÂÂ9 motorway at Rebullón, forming a southern ring road around the city.
It is an autovÃÂa, meaning it is tollâÂÂfree and designed for highâÂÂcapacity urban traffic. Maximum speed is 120â¯km/h, with multiple junctions. Autopistas, by contrast, are tolled roads built to higher access standards.
Construction began around 2001 as part of an extension of the APâÂÂ9 toward Tui. The VGâÂÂ20 was fully operational by November 2005, after ~â¬122 million in investment by SpainâÂÂs Ministry of Transport.
As of 2025, the Porto viaduct, a major span (~347â¯m) on the VGâÂÂ20, experienced structural damage. The Spanish government allocated â¬6.5 million for reinforcement, barrier replacement, and deck resurfacing on a section between kmâ¯9.65 and 10.0.
Additional resurfacing contracts worth approximately â¬2.1 million brought total investment in VGâÂÂ20 and adjacent AâÂÂ55 arterial roads to nearly â¬4.6M.