A new report from The Boston Globe shows that MBTA officials were aware of issues with the Green Line Extension's construction long before the line opened to passengers earlier this year.

Previously on The Common, Taylor Dolven, transportation reporter for The Globe, explained that slow zones were imposed on parts of the GLX after it was discovered that the rails on certain portions of the line were dangerously narrow. Today, Taylor tells us that not only are more than half of the rails along the GLX too narrow, they were built that way to begin with.

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