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The Boston Globe

Metro

Cracked 3rd rails trouble MBTA

MBTA General Manager Beverly A. Scott called for an audit of all third rails on the Red, Orange, and Blue Lines on Wednesday after two of the rails cracked in two days, causing hours of delays and stranding thousands of subway commuters.

The rare cracks disabled the Braintree and Ashmont lines at the JFK/UMass station, with the first appearing during the Tuesday night commute and the second Wednesday morning. The third rail provides electricity to trains, so they could not run until the rails were repaired.

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