What is the name of the bridge that Nick and Gatsby cross to go to New York?

The bridge Nick and Gatsby cross to go to New York is the Queensboro Bridge.

In Chapter 4 of The Great Gatsby, Nick rides with Gatsby from Long Island toward Manhattan. Fitzgerald describes the sunlight flickering through the bridge's steel girders and the city rising beyond it. The bridge gives Nick an idealized view of New York as a place of mystery, beauty, and limitless possibility.

The Queensboro Bridge officially opened in 1909 and connects Queens with Manhattan over the East River. It is also known as the 59th Street Bridge, because its Manhattan end is near East 59th Street. The bridge's name can cause confusion because the novel does not always foreground it in the surrounding action; Nick identifies it in his famous reflection on seeing the city for the first time.

The scene also carries dramatic irony. Nick imagines New York as full of promise, but the trip leads toward the Plaza Hotel confrontation, where Tom exposes Gatsby's criminal wealth and Daisy's inability to abandon her marriage.