However, it's really the city's responsibility to notify everyone, unless otherwise negotiated; when film crews do all that it's generally a courtesy thing. Sometimes the crew wants to do that in advance but the city will ding them for taking the initiative.

Film shoots are a big kickback to the police department. Hiring cops for security is required contractually and it's a sweet assignment because overtime is inevitable. Those jobs go to cops who are close to retirement because pensions are usually calculated as a % of final 2 years' pay. Smart crews also hire or plan their own security because the cops just show up to eat and flirt with the actresses and can't be relied on to watch gear.

Location scouts get paid the big bucks to not only know where to shot but how and to grease all the appropriate wheels.