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The Boston Globe

Metro

Cost high for a Green Line anticrash system

By now, the Green Line crashes have become familiar: May 2008 in Newton, May 2009 near Government Center, last month at Boylston Street Station. One dead, more than 100 injured, thousands delayed, $20 million in damage, lawsuits pending.

All three accidents could have been avoided — if the Green Line were equipped with an automated system to track and control trains to prevent train-to-train collisions and derailments when drivers speed or miss track signals that look like traffic lights.

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