The DC suburbs are a case study in NIMBYism. Lots of communities try to limit through-traffic via all sorts of means: speed bumps, one-way streets, speed cameras, red-light cameras, etc. The interaction of one of these NIMBYist devices with GPS systems is a great lesson about the perils of artificial intelligence and machine learning in all sorts of contexts. Bear with the local details because I think there's a really valuable lesson here.