Joseph Strauss, the designer of the original concept for the Golden Gate Bridge (shown on the main Visionary San Francisco page), thought that perhaps an evocation of the Parisian Arc de Triomphe would look imposing, and perhaps impart a little French éclat to the forest of girders:

 

Increased traffic on the Golden Gate Bridge has prompted some visionaries to propose double decking the structure:

Another vision, this time from the film Bicentennial Man. Note the futuristic city of Tiburon in the distance:

 

Since the bridge directors are always looking for ways to raise more money, one artist proposed this satirical plan to bring in more revenue:

Sketch by Ken Vendley, 2005

Sketch by Ken Vendley, 2005

Golden Gate Bridge with Tidal Power and Desalination Station (by Marc L'italien), 1995-1999

Golden Gate Bridge with Tidal Power and Desalination Station (by Marc L'italien), 1995-1999