Broadway is the Manhattan avenue that hosts New York City's famous Times Square New Year's Eve countdown.
Times Square is formed by the intersection of Broadway and Seventh Avenue, with 42nd Street crossing nearby. The annual celebration takes place in the square and surrounding streets, where spectators watch the midnight countdown and the illuminated ball descend from One Times Square.
Broadway is especially notable because it runs diagonally through Manhattan rather than following the island's regular street grid. In the Times Square area, its alignment helps create the distinctive triangular public space that gave the district its name.
The question asks for the avenue, not the square, district, or nearby cross street. Fifth Avenue, Madison Avenue, and Park Avenue are also major Manhattan streets, but none is the avenue crossing through the central Times Square celebration site.