Sacramento, California has used this system for several years -- Here is a Google Street view ( 33rd Street and H Street ) Sometimes the flags accumulate on one side, but not too often - https://maps.google.com/?ll=38.57434,-121.461777&spn=0.000539,0.000817&t=h&z=21&layer=c&cbll=38.57434,-121.461777&panoid=mQZ9WZNxeA3fwef8Q20V6g&cbp=12,108.95,,0,5.39 Abusive comment hidden. (Show it anyway.) 1 reply
Here is a Google Street view ( 33rd Street and H Street )
Sometimes the flags accumulate on one side, but not too often -
https://maps.google.com/?ll=38.57434,-121.461777&spn=0.000539,0.000817&t=h&z=21&layer=c&cbll=38.57434,-121.461777&panoid=mQZ9WZNxeA3fwef8Q20V6g&cbp=12,108.95,,0,5.39