MD80 CREW WAS UNABLE TO EXPEDITE CLRING THE RWY BECAUSE THEY WERE OPERATING ON 1 ENG AT LGA. AN ACFT ON FINAL HAD TO DO A GAR.

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ON TAXI OUT FROM THE RAMP; WE WERE TURNED R ON TXWY A TO TXWY L; TXWY B AND HOLD SHORT OF TXWY K ON TXWY B. ACR Y; B1900; WAS BLOCKING THE TXWY L ON TXWY B; BUT HAD AMPLE ROOM TO MOVE UP IN LINE TO ALLOW US TO MAKE OUR TURN. SINCE I WAS TOLD ON GND THAT WE WERE #26 OR SO; I STARTED ONLY 1 ENG. THE NEW SMOOTHER TXWYS HAVE ALLOWED US TO SAVE FUEL AS THE BUMPS IN THE OLD PAVEMENT ACTED AS CHOCKS AND SINGLE ENG BREAK-AWAY PWR WAS TOO EXCESSIVE AND POSED A DAMAGE PROB TO ACFT BEHIND. I ASKED GND TO HAVE ACR Y TIGHTEN UP THE LINE SO I COULD KEEP UP THE MOMENTUM REQUIRED TO MAKE THE 180 DEG TURN. WHEN ACR Y STARTED TO MOVE; I ADDED THRUST TO BEGIN THE TURN. AS I INTERSECTED TXWY B ON TXWY L; ACR Y STOPPED 3 PLANE LENGTHS SHORT AND DISALLOWED ME TO COMPLETE THE TIGHT TURN. AT THE INTXN OF TXWY GG; WE WERE TOLD TO HOLD. I EXPECTED TO GO STRAIGHT TO HOLD SHORT OF RWY 22 FROM THAT POINT; SO I DID NOT START THE SECOND ENG. TAXI ON TXWY B TO HOLD SHORT AT TXWY F AGAIN PUT US BEHIND THE ACR Y. SINCE THAT POS IS ON THE REVERSE OBLIQUE; SEEING THE APCHING LNDG TFC IS VERY DIFFICULT FROM THE L SEAT. I EXPECTED TO CROSS THE ACTIVE RWY IN TANDEM BEHIND ACR Y; AS THE FO SAID THAT THERE WAS A BIG INTERVAL. ACR Y WAS SLOW TO CROSS AND WE HAD TO HOLD SHORT FOR ANOTHER SLOT. THE SLIGHT UPHILL; NO MOMENTUM; AND GREATER TAXI DISTANCE TO CROSS FROM THE NON PERPENDICULAR HOLD POS; PUT US AT A DISADVANTAGE WHEN TOLD TO EXPEDITE. A GAR RESULTED BY A COMPANY S80. WE WERE STILL #10 ON THE OTHER SIDE AND GIVEN THE CLOSING WX SYS. I ASKED TO SHUT DOWN.