DC sustainable mobility street signs

I think I have seen this Neighborhood Bikeway ("bike boulevard") bike route sign elsewhere in the city.  This is off Nebraska Avenue.  I can't say I like it all that much.  I think that bike route signage needs a more coherent identity that should simultaneously market cycling.  E.g., see Joseph Prichard's Better Bikeways signage project.

And I saw this sign on 34th Street NW by the Cathedral.  I was really surprised because this is virtually identical (but slightly different graphically) to the same sign used in New York City to denote their special 20 mph neighborhood slow zones.

I don't know if DDOT put these up.  In any case, in DC, such signs do not denote a zone with speed limits less than 25 mph.  Also see "A Vision Zero agenda for DC."

Neighborhood slow zone signage in Brooklyn.