The chaotic good in me has to wonder if you could take it one step further - do this every third day for a few weeks, then "claim responsibility" as some Islamic terrorist group. Get the city panicked and scrutinizing hard on anyone driving too slow, broken down on the side of the road, or in a minor accident. Get the invasiveness and paranoia high enough that everyone is forced to see the ridiculousness of it first hand, rather than blindly believing story time from the terrorists behind news desks.
Good god almighty, I read your post, chuckled slightly having fully understood the DND reference, then I read it again and damn. If there were ever a perfect descriptor for what you just described. Having lived in a city with unending traffic problems among a populace that seems hellbent on voting against it's own desires to fix said problems (Austin Texas), holy cow.
