Sharraxaadda

I've seen more cars blow right through this stop sign than usual in the past month. I'm guessing the tree making it almost impossible to see the stop sign may have something to do with it.

To sign is located on Precita Avenue at the corner of Shotwell. To see it on Google Street View, click the following link:

https://maps.google.com/maps?q=Precita+Avenue,+San+Francisco,+CA&hl=en&ll=37.747349,-122.414842&spn=0.001355,0.00284&sll=37.269174,-119.306607&sspn=11.09543,23.269043&oq=precita+av&hnear=Precita+Ave,+San+Francisco,+California+94110&t=m&z=19&layer=c&cbll=37.747334,-122.414731&panoid=uKmiEK-gtSOWRXKtEo5uPA&cbp=12,326.67,,0,0.08

How do we go about getting the tree branches trimmed?