The Metropolitan Transportation Authority derailed its own plan to shut down a manned token booth at the President Street entrance to the Carroll Street F-train station.

The MTA announcement came on the eve of the agency’s proposed Sept. 14 elimination of the booth, part of larger cost-cutting effort intended to save $52 million.

As a result of the flip-flop, a transit agent will be on site from 6 am until 9:15 pm every day except Sunday while the southern exit from the station, at Second Place, is being rebuilt over the next year.

“I want to thank the MTA for recognizing the need to retain the agent at this entrance because safety cannot be compromised,” said Assemblywoman Joan Millman, one of many pols (and office-seekers) who called for the booth to remain manned. “The closing of the Second Place entrance for up to a year [will increase] ridership at the President Street entrance [so] it is critical for rider safety to have a customer assistance agent there.”

The move came after two Democratic candidates for the City Council district that includes the station rallied at the corner of President and Smith streets. One of the candidates, John Heyer, collected the signatures of 400 straphangers and sent them to the MTA.