After clearing runway 15R at iah C172 pilot is instructed to use wp to wj; hold short of 15L. Report...

Narrative:

The following may be an operational or logistical issue at iah and involves two taxiway signs (or lack of). Upon landing at iah on runway 15R; I was directed to exit at the high speed taxiway ws. Local (tower) control then directed me to proceed on ws and turn right on wp; left turn on wj; hold short of 15L. I read this clearance back to ATC and proceeded to comply with the clearance. My taxi diagram was available and being used.as I turned right on wp; I taxied past an unmarked taxiway on my left that was angled back approximately 135 degrees. I do not remember if there were any taxi lines curving off in that direction. Iah procedures are to not use reverse high-speed taxiways. I stopped taxiing to determine if this unmarked taxiway was wj. ATC stated that I had passed my intersection and should now proceed to wl; turn left and hold short 15L. I read back this clearance and complied.I am familiar with this airport. The taxiway signs and markings are prominently displayed. The lack of a taxiway sign; coupled with the 'reverse' nature of the direction (and possible lack of lead-in taxi lines) makes this a potential area for similar events in the future.furthermore; a review of the airport diagram is found to be lacking due to the small print necessary to depict such a large area. The letters; 'wj' are superimposed over the runway making them appear to be 'wi'. Moreover; due to the limitations of the printable area; the information does not lend itself to rapid assimilation by the pilot (if you need to search for something on the chart; you are going to be 'heads down' in the cockpit).this problem could be resolved through any of the following:1. Install signs depicting the taxiway intersection;2. Not using a taxiway requiring a 135 degree turn;3. Painting a standard taxiway lead in line to the taxiway. Splitting the airport diagram into two separate drawings (possible north and south) allowing for larger diagrams and less clutter.

Original NASA ASRS Text

Title: After clearing Runway 15R at IAH C172 pilot is instructed to use WP to WJ; hold short of 15L. Reporter taxis past WJ due to lack of signage and cluttered government airport diagram.

Narrative: The following may be an operational or logistical issue at IAH and involves two taxiway signs (or lack of). Upon landing at IAH on Runway 15R; I was directed to exit at the High Speed Taxiway WS. Local (Tower) control then directed me to proceed on WS and turn right on WP; left turn on WJ; Hold short of 15L. I read this clearance back to ATC and proceeded to comply with the clearance. My taxi diagram was available and being used.As I turned right on WP; I taxied past an unmarked taxiway on my left that was angled back approximately 135 degrees. I do not remember if there were any taxi lines curving off in that direction. IAH procedures are to NOT use reverse high-speed taxiways. I stopped taxiing to determine if this unmarked taxiway was WJ. ATC stated that I had passed my intersection and should now proceed to WL; turn left and hold short 15L. I read back this clearance and complied.I am familiar with this airport. The taxiway signs and markings are prominently displayed. The lack of a taxiway sign; coupled with the 'reverse' nature of the direction (and possible lack of lead-in taxi lines) makes this a potential area for similar events in the future.Furthermore; a review of the airport diagram is found to be lacking due to the small print necessary to depict such a large area. The letters; 'WJ' are superimposed over the runway making them appear to be 'WI'. Moreover; due to the limitations of the printable area; the information does not lend itself to rapid assimilation by the pilot (if you need to search for something on the chart; you are going to be 'heads down' in the cockpit).This problem could be resolved through any of the following:1. Install signs depicting the taxiway intersection;2. Not using a taxiway requiring a 135 degree turn;3. Painting a standard taxiway lead in line to the taxiway. Splitting the Airport Diagram into two separate drawings (possible North and South) allowing for larger diagrams and less clutter.

Data retrieved from NASA's ASRS site as of April 2012 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.

Attributes
ACN	889338
Time
Date	201005
Local Time Of Day	1801-2400
Place
Locale Reference	IAH.Airport
State Reference	TX
Environment
Flight Conditions	VMC
Light	Dusk
Aircraft 1
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain Single Pilot
Qualification	Flight Crew Instrument Flight Crew Flight Instructor Flight Crew Commercial Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 8000 Flight Crew Type 2000
Events
Anomaly	Deviation - Procedural Clearance Ground Incursion Taxiway

After clearing runway 15R at iah C172 pilot is instructed to use wp to wj; hold short of 15L. Reporter taxis past wj due to lack of signage and cluttered government airport diagram.