Air taxi pilot reported a runway incursion due to faded hold short lines on the taxiway at det.

Attributes
ACN	1582064
Time
Date	201810
Local Time Of Day	1201-1800
Place
Locale Reference	DET.Airport
State Reference	MI
Environment
Flight Conditions	IMC
Aircraft 1
Make Model Name	Cessna Twin Piston Undifferentiated or Other Model
Operating Under FAR Part	Part 135
Flight Phase	Taxi
Route In Use	None
Flight Plan	IFR
Person 1
Function	Ground Pilot Flying Single Pilot
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Flight Instructor Flight Crew Instrument Flight Crew Multiengine
Experience	Flight Crew Last 90 Days 100 Flight Crew Total 20200 Flight Crew Type 11000
Events
Anomaly	Deviation - Procedural Clearance Ground Incursion Runway

Narrative:

The detroit city airport coleman young ground control instructed me to taxi to runway 33. I taxied from the general aviation ramp at the base of the control tower to runway 33 via taxiway 'a' with clearance to cross runway 25 on alpha.the hold short markings and centerline on taxiway a leading to the runway 25 threshold area are faded and difficult to see. I inadvertently crossed the hold short line and then ground control instructed me to hold my position. The aircraft was just beyond the line one aircraft length. Contributing factor was the wet taxiway surface along with faded paint markings and a dull gray overcast day type lighting.no other traffic was on the taxiway or in position on the runway and no other aircraft landed or departed during the time I was holding just beyond the hold short line waiting for takeoff clearance.the hold short line is in a position not consistent with typical hold short location and I was probably focusing my attention in looking for the hold short line in a typical location.

Original NASA ASRS Text

Title: Air taxi pilot reported a runway incursion due to faded hold short lines on the taxiway at DET.

Narrative: The Detroit City Airport Coleman Young Ground Control instructed me to taxi to Runway 33. I taxied from the General Aviation ramp at the base of the control tower to Runway 33 via taxiway 'A' with clearance to cross runway 25 on Alpha.The hold short markings and centerline on taxiway A leading to the Runway 25 threshold area are faded and difficult to see. I inadvertently crossed the hold short line and then ground control instructed me to hold my position. The aircraft was just beyond the line one aircraft length. Contributing factor was the wet taxiway surface along with faded paint markings and a dull gray overcast day type lighting.No other traffic was on the taxiway or in position on the runway and no other aircraft landed or departed during the time I was holding just beyond the hold short line waiting for takeoff clearance.The hold short line is in a position not consistent with typical hold short location and I was probably focusing my attention in looking for the hold short line in a typical location.

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.