Passenger Lift/Elevator (not escalator) is available at MAO end of PF-1, which will take you to FOB, in order to cross over to PF 2/3.
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Currently, washrooms are available only inside waiting hall, which is situated at MAQ/SRR end of PF-1. However, proper washrooms are being constructed (nearing completion) at MAO end of PF-1. (Feb 2021).