There's been a shakeup at the Massachusetts Department of Transportation. Gov. Maura Healey announced Thursday that Monica Tibbits-Nutt has decided to step down from her position as transportation secretary and MassDOT CEO, and MBTA General Manager Phil Eng will be taking her place on an interim basis.

Tibbits-Nutt will stay on as an adviser through the end of the year "to ensure a smooth and efficient transition for MassDOT," a statement from the governor's office said. Tibbits-Nutt is planning to return to the private sector.

Healey praised Tibbits-Nutt for making transportation more affordable for Massachusetts residents by supporting fare-free regional transit programs and a low-income fare program at the MBTA.

"Under her leadership, we made significant progress on some of the most

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