Although it’s obvious New York City’s subway system remains in desperate need of repair, it’s less clear how these renovations, and the required infrastructure maintenance, will be funded. During a “Fixing Mass Transit” event hosted by Crain’s, a former official with the Metropolitan Transportation Authority, Michael Horodniceanu, suggested creating a “transit-maintenance district.” By adding a $1.50 charge to the core business district’s $60-to $70-per-square-foot rents, more than a billion dollars could be raised for transit upkeep, Horodniceanu said.