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Accident Report Detail

Chicago Transit Authority Green Line train run 2, Train/Worker Incident at Tower 18

Executive Summary

On Tuesday, February 26, 2002, at approximately 4:50 a.m., Chicago Transit Authority (CTA) Green Line train run 2 struck two signal maintainers who were working near tower 18, which is on the section of the Chicago Loop that is above the intersection of Lake and Wells Streets in Chicago, Illinois. The Loop is elevated, and one maintainer fell from the structure, landing on a parked car and then the street. Seriously injured, he and the other maintainer were taken to a local hospital by ambulance. At the hospital, he was admitted for further treatment; the other maintainer was treated and released. At the time of the accident, it was dark, the skies were cloudy, snow was falling lightly, and the temperature was 36° F.

Probable Cause

The National Transportation Safety Board determines that the probable cause of the accident was the failure of the signal maintainers to watch for approaching trains and their failure to obey the Chicago Transit Authority's requirement that they increase their visibility by displaying a flashing yellow warning light. Contributing to the maintainers' reduced awareness of oncoming trains was the absence of clear requirements regarding the designation of safety lookouts and the use of interlocking signals to protect work areas.

Accident Location: Chicago , IL    
Accident Date: 2/26/2002
Accident ID: DCA02FR005

Date Adopted: 2/6/2004
NTSB Number: RAB-03-04
NTIS Number:  

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