Narrative:

Taxiing out from gate at bwi; clearance to taxi to runway 15R via taxiway P. Air carrier Y instructed to follow at taxiway C. When I started to turn right from taxiway C and noticed that taxiway P had white stripes -- not yellow -- I do not recall seeing the double segmented yellow lines on the taxiway leading to runway 22/4. I stop the turn. I was too far to turn back to taxiway P. ATC ground cleared me to taxi on runway 22/4 to taxiway P1; wait for air carrier Y to pass and then continue to taxi to runway 15R via taxiway P. On the airport diagram; taxiway a is the inner taxiway from the ramp. The airport diagram depicts an island of grass that taxiway a goes south around. Then another island of grass is depicted for taxiway P. In other words; I'm looking to make a turn after the second island. The angle of direction when taxiing out from the ramp to taxiway C to taxiway P is quite acute; making it hard to see the grass patch on the right that taxiway a goes around. The first patch I saw was actually my second reference point. Turning onto taxiway P from taxiway C I actually was turning towards runway 22/4. Maybe the signage for taxiway P could be better located on that wide taxiway that taxiway C is west of runway 4/22. That may; however; make it difficult for traffic to see coming from a different direction. There are 3 hot spots located on the airport diagram for the intxns near runway 10 and taxiway right; taxiway P; and taxiway P1. The intersection the event occurred on is not one of them.

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Original NASA ASRS Text

Title: FLT CREW TAXIES ONTO RWY 4/22 AT C VICE TXWY P AS CLEARED AT BWI.

Narrative: TAXIING OUT FROM GATE AT BWI; CLRNC TO TAXI TO RWY 15R VIA TXWY P. ACR Y INSTRUCTED TO FOLLOW AT TXWY C. WHEN I STARTED TO TURN R FROM TXWY C AND NOTICED THAT TXWY P HAD WHITE STRIPES -- NOT YELLOW -- I DO NOT RECALL SEEING THE DOUBLE SEGMENTED YELLOW LINES ON THE TXWY LEADING TO RWY 22/4. I STOP THE TURN. I WAS TOO FAR TO TURN BACK TO TXWY P. ATC GND CLRED ME TO TAXI ON RWY 22/4 TO TXWY P1; WAIT FOR ACR Y TO PASS AND THEN CONTINUE TO TAXI TO RWY 15R VIA TXWY P. ON THE ARPT DIAGRAM; TXWY A IS THE INNER TXWY FROM THE RAMP. THE ARPT DIAGRAM DEPICTS AN ISLAND OF GRASS THAT TXWY A GOES S AROUND. THEN ANOTHER ISLAND OF GRASS IS DEPICTED FOR TXWY P. IN OTHER WORDS; I'M LOOKING TO MAKE A TURN AFTER THE SECOND ISLAND. THE ANGLE OF DIRECTION WHEN TAXIING OUT FROM THE RAMP TO TXWY C TO TXWY P IS QUITE ACUTE; MAKING IT HARD TO SEE THE GRASS PATCH ON THE R THAT TXWY A GOES AROUND. THE FIRST PATCH I SAW WAS ACTUALLY MY SECOND REF POINT. TURNING ONTO TXWY P FROM TXWY C I ACTUALLY WAS TURNING TOWARDS RWY 22/4. MAYBE THE SIGNAGE FOR TXWY P COULD BE BETTER LOCATED ON THAT WIDE TXWY THAT TXWY C IS W OF RWY 4/22. THAT MAY; HOWEVER; MAKE IT DIFFICULT FOR TFC TO SEE COMING FROM A DIFFERENT DIRECTION. THERE ARE 3 HOT SPOTS LOCATED ON THE ARPT DIAGRAM FOR THE INTXNS NEAR RWY 10 AND TXWY R; TXWY P; AND TXWY P1. THE INTXN THE EVENT OCCURRED ON IS NOT ONE OF THEM.

Data retrieved from NASA's ASRS site as of May 2009 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.