The cheaper option, which would cost $3.3 billion to $3.6 billion (equivalent to $ to $ in ) and take six years, entailed building a temporary six-lane highway in the location of the promenade while they repaired the underlying structure. Under this option, lanes would be widened, and shoulders would have been added. In conjunction with the project, NYCDOT hoped to unify Van Voorhees Park, improve safety at the interchange with Atlantic Avenue, and possibly build a pedestrian bridge from Brooklyn Bridge Park to the promenade. The other, more expensive option, which would cost $3.4 billion to $4 billion (equivalent to $ to $ in ) and take over eight years, was to repair the existing six-lane highway one lane at a time. The promenade walkway would be closed for up to six years under the first option and for two years under the second option, with periodic closures for construction use. The NYCDOT commissioner, Polly Trottenberg, called the project "the most challenging project not only in New York City, but arguably in the United States right now". For the project, $1.7 billion in city funding was allocated, with the remainder to be footed from the state and federal governments.
