Air carrier crew had runway incursion at cyyz.

Attributes
ACN	498604
Time
Date	200101
Day	Tue
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : cyyz.airport
State Reference	ON
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp
Experience	flight time last 90 days : 180 flight time total : 14000 flight time type : 200
ASRS Report	498604
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	incursion : runway non adherence : clearance
Independent Detector	other controllera
Resolutory Action	controller : issued alert controller : issued new clearance none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Airport
Primary Problem	Airport
Air Traffic Incident	Pilot Deviation
Situations
Airport	markings : cyyz.airport procedure or policy : cyyz.airport signage : cyyz.airport

Narrative:

Toronto ground cleared us to taxi to runway 23 via taxiway a and taxiway H. Taxiway H turns into taxiway Q at the very end. Taxiway H looks like an intersection takeoff. It was dark and we did not see taxi sign Q and taxied to end of runway 23. Ground asked if we were on taxiway Q. We stopped with no conflicts with landing traffic. We departed normally from runway 23.

Original NASA ASRS Text

Title: ACR CREW HAD RWY INCURSION AT CYYZ.

Narrative: TORONTO GND CLRED US TO TAXI TO RWY 23 VIA TXWY A AND TXWY H. TXWY H TURNS INTO TXWY Q AT THE VERY END. TXWY H LOOKS LIKE AN INTXN TKOF. IT WAS DARK AND WE DID NOT SEE TAXI SIGN Q AND TAXIED TO END OF RWY 23. GND ASKED IF WE WERE ON TXWY Q. WE STOPPED WITH NO CONFLICTS WITH LNDG TFC. WE DEPARTED NORMALLY FROM RWY 23.

Data retrieved from NASA's ASRS site as of July 2007 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.