This year marked a change in New York’s parade route, with the city prepping for the 50th anniversary of the Stonewall Uprising in 2019 ― which will also double as a World Pride celebration. The move was designed to speed the flow of the parade and avoid a choke point among narrower streets.
Article source: https://www.huffingtonpost.com/entry/nyc-pride-2018_us_5b3104b2e4b00295f15f4271