Commercial Fixed Wing
Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 74; Flight Crew Total 18076; Flight Crew Type 3721
Distraction; Situational Awareness; Confusion
Deviation / Discrepancy - Procedural Clearance; Ground Event / Encounter Ground Equipment Issue; Ground Incursion Taxiway
Air Traffic Control Issued New Clearance; Flight Crew Requested ATC Assistance / Clarification; Flight Crew Became Reoriented
Human Factors; Procedure; Airport
After taking high speed runway turnoff NN off 8R at IAH; Tower instructed us to join SF. There was a line of aircraft on NA eastbound and both my First Officer and I missed that NN becomes SF. I followed the aircraft thinking they were going to join SF. We had originally planned to exit at NK and I turned eastbound on NA thinking SF was next right turn taxiway ahead. We informed ground control of our mistake and doubled back on NB and then joined SF southbound by their instruction. There was no conflict with other aircraft. The signage for NN turning into SF is nonexistent and in my runway turnoff I mistook and assumed SF would be ahead off NA. It was my mistake.
Air Carrier Captain taxiing in IAH reported they turned on to the wrong taxiway due to a lack of taxiway signage.