Surprisingly, it's already been two years since the city started testing out this traffic-calming measure, forcing all private vehicles to make right turns at Tenth and Sixth Streets. It's a complicated thing, and cars can still turn onto Market from Ninth or Seventh and drive down, but now cars caught driving past Sixth Street are facing more enforcement, and $176 tickets.

Tourists, of course, are the most confused and probably the most likely to get slapped with these tickets, which isn't so nice. But a spokesman for the SFPD, who have been doing stings for the past month particularly during morning commute hours, say not all drivers have gotten tickets -- they've just been pulled over and given "admonishments" especially if they claim not to have seen the signs.

The SFMTA is encouraged by the results of the mandatory right-turns, which include faster transit times for buses, and more cyclists on the roadway. Permanent signs are expected to be installed soon.