After more than 15 years and $14.8 billion, Boston’s

After more than 15 years and $14.8 billion, Boston’s Big Dig project officially ends today.

A study by the Turnpike Authority found the Big Dig cut the average trip through Boston from 19.5 minutes to 2.8 minutes.

Given the number of people moving through the area each day and how much time is saved, $14.8 billion doesn’t seem like such a huge amount.

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