Works begin on the Porto viaduct and the VG-20 will face restrictions until the end of 2026.
The Ministry of Transport and Sustainable Mobility will begin structural reinforcement works on the Porto viaduct next Monday the 12th. The infrastructure is located on the VG-20, Vigo’s ring road. The project will bring significant changes to traffic flow which, according to the official schedule, will remain in place until the end of 2026.
The project was tendered and approved by the Ministry and published in the Official State Gazette on 21 November 2024. The announcement includes an investment of more than five million euros and a total execution period of 32 months, placing the full completion of the works beyond 2027, although the main traffic disruptions will be concentrated in 2026.
The works will take place on the Porto viaduct, located between kilometre points 9.6 and 10.1 of the VG-20, in the Bouzas area. The structure is more than 300 metres long and carries thousands of vehicles every day, which has led the Ministry to plan the intervention in phases in order to keep traffic operating for most of the time.
The first phase will begin in January 2026 with the closure of the left carriageway in the direction of Vigo. Traffic will be diverted to the opposite carriageway, which will operate temporarily with adapted two-way traffic. This reorganisation will remain in place for several months and will be the most noticeable change for drivers.
During the first months of work, structural reinforcement of the viaduct deck will be carried out, considered the most technically complex stage. Later, during the second half of 2026, the parapets and safety restraint systems will be replaced in order to bring the infrastructure into line with current safety regulations.
Although the total duration of the contract exceeds two and a half years, the Ministry expects the most severe traffic restrictions to remain in place for approximately eleven to twelve months, until the end of 2026. At that point, traffic should return to its usual layout, pending finishing works and other complementary actions with a lower impact.
The Ministry recommends that drivers exercise extra caution, comply with temporary signage and plan alternative routes. The project forms part of the national road maintenance programme and aims to ensure the safety, durability and proper condition of one of the most important road infrastructures in the Vigo area.