Cessna Citation Undifferentiated or Other Model
Flight Crew Commercial; Flight Crew Instrument; Flight Crew Multiengine
Flight Crew Last 90 Days 50; Flight Crew Total 1745; Flight Crew Type 260
Confusion; Situational Awareness
Deviation / Discrepancy - Procedural Clearance; Ground Incursion Runway; Ground Incursion Taxiway
General None Reported / Taken
Airport; Chart Or Publication; Procedure
Upon contacting ground I was given taxi instructions of Echo; Yankee; Whiskey; Victor; Alpha; hold short PAPA. I wrote down the directions and had the airport diagram displayed on my MFD and iPad. After a 5-10 minute taxi the taxiway turns left and turns into PAPA. I failed to see the PAPA taxiway designation and did not hold short of PAPA as directed. I was aware of runway 30L on my left and that taxiway PAPA was a direct taxiway to hold short of runway 30 center. I looked right to make sure that the approach to runway 30L was clear and I saw that I was crossing what I thought were the ILS markings however I had inadvertently crossed through not only the ILS markings but taxied through the approach corridor of 30L. I never saw the PAPA taxiway signs on Alpha and as I was so focused on switching over to the tower frequency and making sure I held short of runway 30C all I saw were ILS designated markings and did not recognize them as what I think must have been ILS markings combined with the start of taxiway PAPA. When I called the tower upon landing we discussed it and they told me that they are having internal discussions about the signage and possible issues with it not being clear. I asked them was the sign for taxiway PAPA on the straight part of Alpha or did PAPA start after turning left on the taxiway which becomes PAPA. The tower told me that they were not sure where the PAPA taxiway designation sign was.
Citation Captain reported not being able to see the airport signage for the taxiway that was the limit of his taxi clearance.