MBTA general manager Beverly Scott announced her resignation in a letter addressed to the chairman of the state Department of Transportation board of directors Wednesday afternoon.

In her letter (see: below) to the MassDOT board chairman, John Jenkins, Scott writes that she will officially step down from her post on April 11.

Boston Mayor Marty Walsh addressed Scott’s resignation in statement:

I thank Dr. Beverly Scott for her deep commitment to our public transportation system and to the people of Boston and the Commonwealth. She has shown leadership and courage during the challenges we are facing, and I wish her the best of luck in the future. I look forward to working with the Governor to improve our public transportation system to better serve our residents who rely on it everyday.

For the better part of the last couple of weeks, the T’s performance has been abysmal; though historic amounts of snow in the Boston area hasn’t done the authority – or its ancient trains – any favors, the T’s inability to provide efficient service during the recent winter blitz, has raised questions about Scott’s leadership.

Here’s her full letter of resignation:

MBTA GM Scott Letter

The tipping point seems to have been the T’s decision to cancel its Tuesday service out of concern the system’s subways, trolleys and buses – outdated vehicles, which have consistently taken a beating since the end of January – wouldn’t be able to sustain the wintery conditions.

On Monday, Governor Charlie Baker – again – expressed disappointment with the T’s performance, but fell short of placing the blame squarely on the shoulders of the T’s general manager.

Scott followed with her own press conference on Tuesday, in which she passionately defended the transit authority, suggesting that a combination of insufficient funding and leftover debt from the Big Dig has made it difficult for the T to provide quality service.

Gov. Baker is scheduled to meet with the T on Thursday.

In response to Scott’s announcement, the state house released the following statement on behalf of Gov. Baker and Lt. Gov. Karyn Polito:

The Governor and Lt. Governor were surprised to learn of Dr. Scott’s resignation [Wednesday] afternoon. They thank her for her contribution to the Commonwealth and are grateful for her offer of assistance as the MBTA transitions to a new General Manager. The Governor looks forward to meeting with MBTA officials [Thursday], working with them to assess the issues that have plagued the agency in recent weeks and developing operational maintenance plans moving forward.