An in-road pedestrian sign might be doable if there's someone around who'll agree to keep an eye on it and put it back in place when (not if) negligent/malicious drivers run it over. The in-road pedestrian signs have been in storage over the winter because 1 in 10 snow plow drivers like to smash things that are in the road (or not in the road, like defenseless young trees!--sorry, personal experience). Yeah, so just find someone who lives/works nearby who can look after it, contact Transportation, Traffic and Parking, and you might be able to work something out. I should note that we really only know for sure that in-road ped signs work on narrow, two-way streets like State or Olive, and so the city has been prioritizing those streets. I hope this was helpful.