Not sure how this is effecting traffic, if at all... but I'm watching live footage of it online right now. Looks like they're giving the bridge a pretty nice decoration job, with additional smaller tibetan prayer flags. Looks like someone from the bridge crew has now climbed up on a special bucket lift to talk to them.
You know, as far as protests go, this is an interesting one. That said, I wouldn't want to do it...!
*** Update: Looks like they're taking it down already. That didn't last long... ***