From Streetsblog SF:
DPT crews installed San Francisco's first physically separated bike lane this morning on a westbound stretch of an existing bike lane on Market Street between 9th and 10th, and before workers had even finished putting in the final safe-hit post, some drivers began disrespecting it, rolling into the lane, causing bicyclists to merge into auto traffic.
The 35 three-foot tall reflective posts were tacked onto Market Street with AP epoxy, which takes up to 24 hours to dry. While they're designed to flip back up if a driver rolls over them, they're vulnerable until they dry.
Some passersby suggested the MTA needs to install more signage for drivers, or do something more bold like paint the lane green so drivers get the message they need to stay out.