B737 ng flight crew reported a ground conflict during taxi where the taxi lines at dca on taxiways K...

Attributes
ACN	1525756
Time
Date	201803
Local Time Of Day	0601-1200
Place
Locale Reference	DCA.Airport
State Reference	DC
Environment
Light	Daylight
Aircraft 1
Make Model Name	B737 Next Generation Undifferentiated
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Aircraft 2
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 112
Person 2
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 409
Events
Anomaly	ATC Issue All Types Conflict Ground Conflict Critical

Narrative:

After landing at dca; we contacted ground and were given the clearance to taxi to the gate via taxiways J; F and K. As we turned onto J from M; we were behind a very slow moving (other carrier) aircraft; which was taxiing for departure via J; P; C and short of runway 4. Once we side-stepped over to taxiway K we were parallel with the (other carrier) aircraft. Near the intersection of P and C; the taxi lines for taxiway K and P come closer together. The captain fortunately saw this and stopped the taxi. We are both convinced that had he not done this; the wingtip of our aircraft could have struck the (other carrier) aircraft wingtip. Our concern is with the proximity of the taxi lines. With additional threats such as low visibility or distractions; a collision could occur. The ground frequency was very congested and we were unable to query the controller at that time.fortunately; the captain noticed the proximity to the other aircraft in time to avoid a collision. Had he not; this would be a much different story. Perhaps a note for a safety concern or even a hot spot added to the taxi diagram might help pilots stay aware of the possible hazard.

Original NASA ASRS Text

Title: B737 NG flight crew reported a ground conflict during taxi where the taxi lines at DCA on Taxiways K and P come closer together near the intersection of Taxiways P and C.

Narrative: After landing at DCA; we contacted Ground and were given the clearance to taxi to the gate via Taxiways J; F and K. As we turned onto J from M; we were behind a very slow moving (other carrier) aircraft; which was taxiing for Departure via J; P; C and short of Runway 4. Once we side-stepped over to Taxiway K we were parallel with the (other carrier) aircraft. Near the intersection of P and C; the taxi lines for Taxiway K and P come closer together. The Captain fortunately saw this and stopped the taxi. We are both convinced that had he not done this; the wingtip of our aircraft could have struck the (other carrier) aircraft wingtip. Our concern is with the proximity of the taxi lines. With additional threats such as low visibility or distractions; a collision could occur. The Ground frequency was very congested and we were unable to query the Controller at that time.Fortunately; the Captain noticed the proximity to the other aircraft in time to avoid a collision. Had he not; this would be a much different story. Perhaps a note for a safety concern or even a Hot Spot added to the taxi diagram might help pilots stay aware of the possible hazard.

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.

B737 ng flight crew reported a ground conflict during taxi where the taxi lines at dca on taxiways K and P come closer together near the intersection of taxiways P and C.