B737 flight crew reported a taxi deviation at sdf citing poor signage and markings as contributing.

Attributes
ACN	1410301
Time
Date	201612
Local Time Of Day	1201-1800
Place
Locale Reference	SDF.Airport
State Reference	KY
Environment
Light	Night
Aircraft 1
Make Model Name	B737 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 224
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 132
Events
Anomaly	Deviation - Procedural Clearance Ground Incursion Taxiway

Narrative:

Cleared to taxi to runway 35L via juliet golf bravo. Cleared across runway 11. Both pilots had taxi charts displayed and were outside during taxi. From juliet; turned right on golf and started trying to identify bravo. Not sure what signage exists for bravo; but never saw it. Being dark and not seeing a bravo sign; taxied past bravo. Almost immediately approached hold short line and signage for runway 35L. Recognizing an imminent runway incursion; started braking to stop. Simultaneously; first officer and ground controller called for a stop. Aircraft was stopped short of runway 35L hold lines. Subsequently cleared for further taxi to runway 35L. After missing bravo; all parties immediately recognized [the] threat and took immediate and appropriate action. Marked on chart as HS4 and briefed. This did not prevent [the] mistake; but probably helped ameliorate it. Bottom line; this is a very confusing intersection; especially at night.other than not making mistake; not sure what else I could have done. As I said; I am not sure what signage exists at this intersection or if it is lighted. Perhaps better signage would help.

Original NASA ASRS Text

Title: B737 flight crew reported a taxi deviation at SDF citing poor signage and markings as contributing.

Narrative: Cleared to taxi to Runway 35L via Juliet Golf Bravo. Cleared across Runway 11. Both pilots had taxi charts displayed and were outside during taxi. From Juliet; turned right on Golf and started trying to identify Bravo. Not sure what signage exists for Bravo; but never saw it. Being dark and not seeing a Bravo sign; taxied past Bravo. Almost immediately approached hold short line and signage for Runway 35L. Recognizing an imminent runway incursion; started braking to stop. Simultaneously; First Officer and Ground Controller called for a stop. Aircraft was stopped short of Runway 35L hold lines. Subsequently cleared for further taxi to Runway 35L. After missing Bravo; all parties immediately recognized [the] threat and took immediate and appropriate action. Marked on chart as HS4 and briefed. This did not prevent [the] mistake; but probably helped ameliorate it. Bottom line; this is a very confusing intersection; especially at night.Other than not making mistake; not sure what else I could have done. As I said; I am not sure what signage exists at this intersection or if it is lighted. Perhaps better signage would help.

Data retrieved from NASA's ASRS site 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.