Narrative:

[We were] leaving the ramp after having coordinated with metering; then ground. Given instructions to follow two rj's from the left; taxing north on [taxiway] a; left on [taxiway] A-7 to [taxiway] T for a [runway] 32L [intersection] T-10 departure. While northbound on [taxiway] a; [we] switched to monitor tower. As we made our left turn on [taxiway] A-7 a very high speed; unidentified rj from the right came around the corner; southbound on [taxiway] B. His taxi light was on and his speed precluded his yielding to our crossing at [taxiway] A-7. We queried tower; but he didn't have the rj on his strip. My captain had to hit the brakes abruptly to avoid a ground collision to the speeding; non-yielding rj from the right. After the near-collision; we reported the incident to tower; informed them we would be making a report; [we] then taxied as cleared and departed on [runway] 32L at T-10 as planned.

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Original NASA ASRS Text

Title: A B737 took evasive action from a RJ taxiing at a very high speed which ORD Ground Control and Tower were not coordinating with other traffic.

Narrative: [We were] leaving the ramp after having coordinated with Metering; then Ground. Given Instructions to follow two RJ's from the left; taxing north on [Taxiway] A; left on [Taxiway] A-7 to [Taxiway] T for a [Runway] 32L [Intersection] T-10 Departure. While northbound on [Taxiway] A; [we] switched to monitor Tower. As we made our left turn on [Taxiway] A-7 a VERY high speed; unidentified RJ from the right came around the corner; southbound on [Taxiway] B. His taxi light was on and his speed precluded his yielding to our crossing at [Taxiway] A-7. We queried Tower; but he didn't have the RJ on his strip. My Captain had to hit the brakes abruptly to avoid a ground collision to the speeding; non-yielding RJ from the right. After the near-collision; we reported the incident to Tower; informed them we would be making a report; [we] then taxied as cleared and departed on [Runway] 32L at T-10 as planned.

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.