F1 race director Charlie Whiting visited the Hanoi location ahead of the Japanese GP, and said he had no doubts that the facility would be ready.
Formula 1 is gearing up to confirm the arrival of a Vietnam Grand Prix on the 2020 calendar following conclusive discussions between Liberty Media and the event's promoters in Hanoi.
Vietnam would be the first new race introduced by commercial rights holders Liberty Media, who took control in January previous year and ousted former supremo Bernie Ecclestone.
"There is no actual progress at building the track, but the site has been identified", he said.
"It's in the advanced stages of design", said the Briton, who flew to Vietnam between races on successive weekends in Russian Federation and Japan.
"It is mainly on the streets, but there is a section that is not yet built", he added.
"It's an open site where the pit building's going to be built", he said.
Vietnam, one of south-east Asia's fastest-growing economies, had set its sights on becoming a Grand Prix venue under the Bernie Ecclestone era. "There will be part of the track that will be built there, which doesn't exist at the minute but it will become a road". F1 sponsor Heineken is expected to be the title sponsor of the race should it go ahead. The country has never hosted a Formula One race before, and it is just the latest signs of development with Liberty Media's plans to broaden F1's horizons.
Whiting confirmed that the circuit would partly be based on current public roads, but would also feature a new section being built specifically for the race.