Commercial Fixed Wing
Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument
Distraction; Situational Awareness; Confusion
No Specific Anomaly Occurred Unwanted Situation
Procedure; Chart Or Publication; Airport; ATC Equipment / Nav Facility / Buildings
S2 and S1 labeling signs short of Runway 27L gives the perception that S2 is S1. Move the sign to better location.
Air Carrier Captain taxiing for departure from PHL reported confusing taxiway signage.