The longest urinal is 290 feet from spout to drain. It's transitory. If you want to use it, run the New York City marathon. You, and hundreds of others, can whiz into it as to run from borough to borough.
The bridge is the Verrazano narrows. The photo is by Dan Wood, an artist who specializes in researching and documenting important historic toilets.
Do you know of a longer urinal? Have you used this one?