Narrative:

While taxiing to runway 21C for takeoff, we used the inner and transitioned to the outer 'X' at O3. The yellow 'outer-X' signs are located on the east side of 'outer-X' but adjacent and prior to runway 21C. They clearly indicate that 21C is the outer-X! Less than 1/2 mi farther down the runway 2 air carrier Y jets collided after one became confused at the taxiway/runway markings and entered the active runway! After entering the taxiway I asked ground to verify that we were actually on the outer. He replied that we were and that those signs are 'kind of confusing' out there! They are not confusing! They clearly are wrong! Lucky for us it was clear. The air carrier Y crews did not enjoy the good visibility. This is another accident waiting to happen.

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Original NASA ASRS Text

Title: ACR CAPT COMPLAINT ABOUT PLACEMENT OF TAXIWAY SIGNS AT DTW.

Narrative: WHILE TAXIING TO RWY 21C FOR TKOF, WE USED THE INNER AND TRANSITIONED TO THE OUTER 'X' AT O3. THE YELLOW 'OUTER-X' SIGNS ARE LOCATED ON THE E SIDE OF 'OUTER-X' BUT ADJACENT AND PRIOR TO RWY 21C. THEY CLRLY INDICATE THAT 21C IS THE OUTER-X! LESS THAN 1/2 MI FARTHER DOWN THE RWY 2 ACR Y JETS COLLIDED AFTER ONE BECAME CONFUSED AT THE TAXIWAY/RWY MARKINGS AND ENTERED THE ACTIVE RWY! AFTER ENTERING THE TAXIWAY I ASKED GND TO VERIFY THAT WE WERE ACTUALLY ON THE OUTER. HE REPLIED THAT WE WERE AND THAT THOSE SIGNS ARE 'KIND OF CONFUSING' OUT THERE! THEY ARE NOT CONFUSING! THEY CLRLY ARE WRONG! LUCKY FOR US IT WAS CLR. THE ACR Y CREWS DID NOT ENJOY THE GOOD VISIBILITY. THIS IS ANOTHER ACCIDENT WAITING TO HAPPEN.

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.