No U Turn

The placement of the sign in this photo always made me wonder who it was truly posted for.

It is on the Pedestrian side, not on the traffic side. Is it one last warning for people considering making the leap?

"Golden Gate Bridge jumpers by year" by RicHard-59 - Own work, based on image originally from The Chronicle. Licensed under CC BY-SA 3.0 via Wikimedia Commons - 

The real last warning sign...