A tug fails to yield to B757 at ord. Flight crew stopped aircraft prior to a collision.

Attributes
ACN	715790
Time
Date	200611
Local Time Of Day	0001 To 0600
Place
Locale Reference	airport : ord.airport
State Reference	IL
Altitude	agl single value : 0
Aircraft 1
Controlling Facilities	artcc : rjaa.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 125 flight time total : 18000 flight time type : 2000
ASRS Report	715790
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : ground less severe ground encounters : vehicle incursion : taxiway non adherence : published procedure
Independent Detector	other flight crewa
Resolutory Action	flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Company Airport
Primary Problem	Company

Narrative:

We departed the gate and were assigned runway 22L via txwys B and D. On taxiway B in the vicinity of intersection F and A15; a tug with 2 bag carts in tow approached the intersection from right to left and was not able to stop without encroaching on taxiway B. Fortunately; I was able to see him in my peripheral vision and stop in time to avoid a collision. With some difficulty; the tug driver was able to back up enough for us to continue taxiing. My first officer was able to get a vehicle number. We advised ATC and later in-flight; we also advised dispatch for follow-up.

Original NASA ASRS Text

Title: A TUG FAILS TO YIELD TO B757 AT ORD. FLT CREW STOPPED ACFT PRIOR TO A COLLISION.

Narrative: WE DEPARTED THE GATE AND WERE ASSIGNED RWY 22L VIA TXWYS B AND D. ON TXWY B IN THE VICINITY OF INTXN F AND A15; A TUG WITH 2 BAG CARTS IN TOW APCHED THE INTXN FROM R TO L AND WAS NOT ABLE TO STOP WITHOUT ENCROACHING ON TXWY B. FORTUNATELY; I WAS ABLE TO SEE HIM IN MY PERIPHERAL VISION AND STOP IN TIME TO AVOID A COLLISION. WITH SOME DIFFICULTY; THE TUG DRIVER WAS ABLE TO BACK UP ENOUGH FOR US TO CONTINUE TAXIING. MY FO WAS ABLE TO GET A VEHICLE NUMBER. WE ADVISED ATC AND LATER INFLT; WE ALSO ADVISED DISPATCH FOR FOLLOW-UP.

Data retrieved from NASA's ASRS site as of January 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.