Narrative:

Planned landing in bwi on runway 33L. We were assigned to park at gate X. On the current ATIS; it had a NOTAM that said 'taxi F closed between taxiway P and taxiway T.' so we had an expectation bias to exit runway 33L at taxiway F and that our taxi-in instructions would be to taxi to gate X via taxiway P; east; and T. Partly contributing to this expectation was the fact that the last time I flew a month ago; there was also construction on taxiway T between taxiways H and F. We also had an additive condition which I briefed at the beginning of the trip that this was my first trip back to work after not flying for 30 days.however; after landing rollout and upon exiting runway 33L at taxiway F; we were given instructions by tower to taxi to gate X via 'taxiway P; T to T; and contact ground.' I thought the controller had stuttered when he said 'T to T.' so I made the right turn from F to P; thinking he meant 'P; east; T.' we contacted ground after making the right turn on to taxiway P. Ground then told us we had turned the wrong way and should have been going the opposite direction on P; then T2; to T. We asked what taxiway T2 is; since taxiway T2 is not depicted anywhere on the 10-9 page. He said it is a new taxiway. I do not recall any notams saying there is a new taxiway T2; nor where it is located. There was nothing on the ATIS about it.we did not cause any traffic conflicts and held at our current position so that outbound aircraft could taxi out. We were then cleared to our gate without any further incident.in the future; I will remember to stop the aircraft immediately and query ATC whenever there is any doubt or ambiguity in a taxi clearance. Also recommend that the bwi airport advise on their ATIS and their notams that there is a new taxiway T2. Furthermore; I would recommend they use a different name for the new taxiway; as the two different phrases 1) 'T to...' and 2) 'T2' can be easily misconstrued for each other in a verbal clearance.'

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Original NASA ASRS Text

Title: Air Carrier Captain reported a taxiway incursion and stated Taxiway T2 which was included in their clearance is not charted.

Narrative: Planned landing in BWI on Runway 33L. We were assigned to park at Gate X. On the current ATIS; it had a NOTAM that said 'Taxi F closed between Taxiway P and Taxiway T.' So we had an expectation bias to exit Runway 33L at Taxiway F and that our taxi-in instructions would be to taxi to Gate X via Taxiway P; E; and T. Partly contributing to this expectation was the fact that the last time I flew a month ago; there was also construction on Taxiway T between Taxiways H and F. We also had an additive condition which I briefed at the beginning of the trip that this was my first trip back to work after not flying for 30 days.However; after landing rollout and upon exiting Runway 33L at Taxiway F; we were given instructions by Tower to taxi to Gate X via 'Taxiway P; T to T; and contact Ground.' I thought the Controller had stuttered when he said 'T to T.' So I made the right turn from F to P; thinking he meant 'P; E; T.' We contacted Ground after making the right turn on to Taxiway P. Ground then told us we had turned the wrong way and should have been going the opposite direction on P; then T2; to T. We asked what Taxiway T2 is; since Taxiway T2 is not depicted anywhere on the 10-9 page. He said it is a new taxiway. I do not recall any NOTAMs saying there is a new Taxiway T2; nor where it is located. There was nothing on the ATIS about it.We did not cause any traffic conflicts and held at our current position so that outbound aircraft could taxi out. We were then cleared to our gate without any further incident.In the future; I will remember to stop the aircraft immediately and query ATC whenever there is any doubt or ambiguity in a taxi clearance. Also recommend that the BWI airport advise on their ATIS and their NOTAMs that there is a new Taxiway T2. Furthermore; I would recommend they use a different name for the new Taxiway; as the two different phrases 1) 'T to...' and 2) 'T2' can be easily misconstrued for each other in a verbal clearance.'

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.