As a civil engineer with a thorough understanding of traffic operations, I'd have no problem if a municipal government started tossing jaywalkers in jail. In a city like New York they are enormous pains in the @ss, and pose serious impediments to vehicular traffic and safety concerns for themselves and others.
The pedestrians wouldn't even fit on the sidewalks outside of Penn Station during rush hour. You had to walk on the streets. But there were plenty of crazy pedestrians, for sure. I just see the image of barricaded sidewalks and strict fines for j-walking as emblematic of Julie Annie's authoritarian overreach.
Maybe I should post the gum-spitting penalties he proposed?