LGT TAXIES ON AREA WHERE CONSTRUCTION IS OCCURRING. PLASTIC BUCKET WEDGED BTWN MAIN GEAR TIRES.

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LNDG AT DCA WAS SMOOTH AND UNEVENTFUL. TWR CLRED FLT LGT TO LAND ON RWY 36 AND; AFTER TOUCHDOWN; CLRED FLT LGT TO TURN ONTO RWY 33. ACFT FOLLOWED BRIGHT YELLOW TAXI LINE ONTO RWY 33. TWR THEN STATED 'CONTACT GND CTL WHEN CLR.' NO DIRECTION WAS GIVEN TO TAXI TO THE END OF RWY 33. AS PER NOTAM; CREW EXPECTED TO TAXI TO THE END OF RWY 33 BUT WAS NOT DIRECTED TO TAXI TO THE END OF RWY 33. ACFT FOLLOWED BRIGHT YELLOW (NEW TAXI LINE) LINE AND EXITED RWY 33 ON FIRST AVAILABLE BUT UNMARKED TXWY. AFTER TURNING ONTO TXWY; ACFT EXPERIENCED A BUMP BUT CREW ASSUMED THAT BUMP WAS CAUSED BY ROUGH CONDITION OF TXWY. TXWYS IN DCA ARE FREQUENTLY ROUGH AND UNEVEN. THE FIRST XMISSION FROM GND CTL STATED: GIVE WAY TO ACR ON YOUR R.' CREW OBSERVED ACR ON ADJACENT TXWY AND STOPPED. AFTER ACR PASSED; GND CTL CLRED FLT TO 'PARKING AREA.' NO MENTION WAS MADE BY EITHER GND CTL OR TWR CAUTIONING ACFT TO AVOID ANY AVAILABLE OR VISIBLE TXWYS. NO CONCERN WAS EXPRESSED BY GND CTL CONCERNING ACFT'S TURN ONTO AN INAPPROPRIATE TXWY. ON POST-FLT; MECH SPOKE TO CAPT CONCERNING A WHITE PLASTIC BUCKET WHICH WAS WEDGED BTWN #1 AND #2 MAIN TIRES. #1 MAIN TIRE HAD A SMALL CUT ON THE INSIDE OF THE TIRE AND THE TIRE WAS REPLACED AT DCA. L- HANDED EXITS OFF OF RWY 33 ONTO TXWY K OR J PROHIBITED UNTIL FURTHER NOTICE. IF TURNOFF ON RWY 33 FROM RWY 36 EXPECT TO EXIT AT END OF RWY 33 DUE TO AUTH TURNOFF ON TXWY K OR J DUE CONSTRUCTION BARRIERS. NUMEROUS RWY/INTXN/TXWY HOLD SIGNS OTS. EXPECT PERIODIC CLOSURES OF TXWYS A-M TILL DEC/XX/93. AWIS NIGHTLY ADVISORIES WILL BE ISSUED TO ANNOUNCE CLOSURES.