Two tunnel projects have been completed at Pudong airport to reduce the shuttle times for remote boarding, while better connecting T1 and T2 with the new satellite terminal. The new terminal, the world’s largest satellite terminal known as S1 and S2, is about 700 meters from the T1 and T2 terminals. It is scheduled to open later this year. The new tunnels will serve luggage, shuttle and service vehicles between T1 and S1 as well as T2 and S2. A subway line will transport passengers between T2 and S2 through the tunnel, Shanghai Airport Authority said on Tuesday.