Now we have two tactical urbanism tools to encourage shared streets.
1. No Parking signs. Like in Malibu, of all places. Yes, I'm serious. Wash West has the highest shared-street quotient in the city, and many of these streets have strong--signposted--No Parking regulations in place, as well as bollards preventing parallel parking on sidewalks. (In saying this, I retract my previous post on the subject: I was clearly wrong). The easiest way to make this happen, if you live on a Small Street, would be to contact your block (group) captain and request that on-street parking be removed from your block and it be turned into a shared space (a tour through Wash West may be helpful here). If that doesn't work, more...tactical solutions may be needed.
2. Pedestrian sharrows. Create a large stencil and paint it at the head of a small street.