Widebody Transport
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Flight Crew Last 90 Days 250; Flight Crew Total 5000; Flight Crew Type 3800
Situational Awareness; Distraction; Confusion
Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural Clearance; Ground Incursion Taxiway
Flight Crew Became Reoriented; Flight Crew Returned To Clearance
Environment - Non Weather Related; Chart Or Publication; Airport; Procedure
When changing the frequency from Ground to the Ramp; I misidentified Taxiway H as M in ramp area while I was told to taxi via H; A; M (the actual way I went was H; A; H). As soon as I found it; I stopped the aircraft; and re-joined Taxiway M to the gate. The possible reason might be same taxiway; but different name. West of Taxiway A; Taxiway H change the name to H1; but it is a straight line. It made me think the next taxiway to the south is M; but it is H. Lack of ground painting and signboard at the intersection of Taxiway A and H. I believe it will do some help if there is one to notify pilots Taxiway H not on the same line.
A Captain taxiing into the International Terminal at SFO became confused by the lack of signage on Taxiway A when Ramp Taxiways H1; H and M do not align with corresponding outer taxiways of the designation.