For a T2-arrival/T1-departure connection, follow the green transfer signs to the B1 train, first riding to the Concourse and changing there for a T1-bound train. Both legs are listed at roughly five-minute intervals, and reverse travel is not allowed. At T1, pass transfer security on level 2 and continue to level 3 departure gates. The airport identifies T1 transfer desks on level 2 before security and level 4 after security; confirm ticket arrangements with the airline.