Breaking the Code: Why are These Colorful Marks All Over San Francisco Sidewalks These Days?

It’s a Mystery…

Click to expand

[UPDATE: It's no longer an mystery - it's all about mosquito abatement, per Bill in the Comments section. So cyclists drop a pill or whatever they drop and then leave a colored mark to show the job was done.

As they say, Mors Ab Alto (Death From Above). Thanks Bill!]

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3 Responses to “Breaking the Code: Why are These Colorful Marks All Over San Francisco Sidewalks These Days?”

  1. Donald says:

    Their logo makes me cringe.

  2. sfcitizen says:

    Actually, that’s my creation. Kind of crappy on purpose. Don’t know how to do a better job, fundamentally. Submit a better one and I can post it?