A few weeks ago, Katherine Roberts was controlling the lane up narrow Masonic Avenue in San Francisco when an irate man driving too fast brushed past as he yelled and made obscene gestures at her. Some words were exchanged at the next intersection.

After she turned onto Haight Street, somebody directly behind her started gunning his engine to intimidate her. Katherine was biking alone at night and didn’t want to risk a closer encounter with the mad motorist, so she ran a stop sign to get away from him. And that’s when she discovered the revving engine belonged to San Francisco’s finest: Officer Anderson and Officer Conway who patrol out of SFPD Park Station.

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