When departing the cargo ramp at las an air carrier jet turned right on taxiway Q vice C as cleared....

Narrative:

When we made our initial call to grnd cntl for taxi clearance; we were given 'taxi to 1R via charlie; charlie 2; bravo; delta; cross 25R'. The first officer and I briefly reviewed the instructions and began to taxi. Exiting the ramp I was initially watching the wing walkers for [another departure] as they were waiting for us to pass so they could push back. Continuing to taxi; I noticed many construction barricades ahead of us as well as to our left and the area was very dark which was complicated by our runway turn off light being inop. I made the right turn onto the taxiway which we thought was charlie but was told by ATC that the taxiway we were on was quebec. I then made the left turn on C1 to join taxiway C. At no time was there any traffic conflict. The rest of the taxi to runway 1R was uneventful. The lighting and signage is very poor in this area and all of the barricades just added to the confusion. Our right runway turnoff light being inop just added to the poor lighting since we were turning right out of the ramp area.

Original NASA ASRS Text

Title: When departing the cargo ramp at LAS an air carrier jet turned right on Taxiway Q vice C as cleared. Poor signage and ramp lighting plus a deferred inoperative runway turnoff taxi light were cited as contributing factors.

Narrative: When we made our initial call to Grnd Cntl for taxi clearance; we were given 'Taxi to 1R via Charlie; Charlie 2; Bravo; Delta; Cross 25R'. The First Officer and I briefly reviewed the instructions and began to taxi. Exiting the ramp I was initially watching the wing walkers for [another departure] as they were waiting for us to pass so they could push back. Continuing to taxi; I noticed many construction barricades ahead of us as well as to our left and the area was very dark which was complicated by our runway turn off light being inop. I made the right turn onto the taxiway which we thought was Charlie but was told by ATC that the taxiway we were on was Quebec. I then made the left turn on C1 to join taxiway C. At no time was there any traffic conflict. The rest of the taxi to runway 1R was uneventful. The lighting and signage is very poor in this area and all of the barricades just added to the confusion. Our right runway turnoff light being inop just added to the poor lighting since we were turning right out of the ramp area.

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.

Attributes
ACN	1223364
Time
Date	201412
Local Time Of Day	1801-2400
Place
Locale Reference	LAS.Airport
State Reference	NV
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Taxiing Light
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Clearance Ground Incursion Taxiway

When departing the cargo ramp at las an air carrier jet turned right on taxiway Q vice C as cleared. Poor signage and ramp lighting plus a deferred inoperative runway turnoff taxi light were cited as contributing factors.