Taking taxpayers on a runaway ride 

The image of a driverless runaway train provides the perfect visual metaphor for the endless travails of the MBTA, especially following the snowbound debacle of last winter. But the runaway train is not just a metaphor or a figure of speech. It actually happened.

The image of a driverless runaway train provides the perfect visual metaphor for the endless travails of the MBTA, especially following the snowbound debacle of last winter. But the runaway train is not just a metaphor or a figure of speech. It actually happened.…