New York's high rate of public transit use, over 200,000 daily cyclists as of 2014, and many pedestrian commuters make it the most energy-efficient major city in the United States. Walk and bicycle modes of travel account for 21% of all modes for trips in the city; nationally the rate for metro regions is about 8%. In both its 2011 and 2015 rankings, <answer>Walk Score</answer> named New York City the most walkable large city in the United States. Citibank sponsored the introduction of 10,000 public bicycles for the city's bike-share project in the summer of 2013. Research conducted by Quinnipiac University showed that a majority of New Yorkers support the initiative. New York City's numerical "in-season cycling indicator" of bicycling in the city hit an all-time high in 2013.
Who ranked New York as the most walkable large US city in 2015?
Walk Score