McDonnell Douglas Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Taxiway
Air Traffic Control Issued Advisory / Alert; Air Traffic Control Issued New Clearance
Procedure; Human Factors; Airport
After landing on 26L [at IAH]; I was instructed to exit at Taxiway NR. After exiting; Ground first instructed us to taxi via NA-NE-WA-to parking. After read back it was changed to NR-WW-WA-to parking. Looking at diagram we appeared to be on NE; so I taxied straight ahead looking for WW. The intersection of NR and WW is not marked. After we passed it Ground instructed us to continue and join WB to parking; which we did.
An air carrier Captain advised that Taxiway WW at NR is not marked at IAH. As a result he missed the turn given by Ground Control after exiting Runway 26L.