The letter is dated March 23. Reached for comment, Greenstein confirmed that it was in response to a letter that he sent her about the matter.
"I appreciate you keeping me apprised of this matter and thank you for your offer to follow up with more information," the prominent Chappaqua resident wrote. "I am receiving updates from my staff, and remain grateful for your leadership and attention to this most urgent public safety concern."
Greenstein has been pushing for federal funding to help pay for replacing the grade crossing with a bridge.
The grade crossing includes the intersection with Roaring Brook Road and is near an interchange with the Saw Mill River Parkway.
Safety at the grade crossing has received heightened attention since the Feb. 3 deadly train collision at a similar intersection in Valhalla, an event that Clinton mentioned in her letter.
"(Former President) Bill (Clinton) and I were so deeply saddened by the tragic accident that occurred on Feb. 3, 2015 and offered our deepest condolences to the New Castle community for this heartbreaking loss of life," she wrote.
A copy of Clinton's letter is available here.
Previous coverage regarding the grade crossing in Chappaqua can be found here.
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