Playing in the city is almost not possible, the game starts at 60fps and when I go on duty drops to 30.  When I go way up north it goes up to 40-50, everything is up to date and I have a 1060 6g.  I have re installed the game and all mods twice with no luck, any thoughts?

This is the reality of playing LSPDFR with plugins active, i start at 80+ and drop instantly to 20-30 when i go On Duty, as you say in the City while patrolling it's annoyingly choppy, low 19-24 FPS, but when i get outside of the City its 30-40 like yours. I have countless plugins and scripts and mods, and from what i understand once you install 5+ plugins ontop of LSPDFR your FPS plummets. I am running an old AMD rig and experience your same issue. I am literally about to drop 900-1,200 US Dollars on a new gaming PC in hopes to play this and some other games at a higher FPS with better graphics settings. I have a grim feeling even with the best I7 Processor and a brand spanking new 1080 Video Card i won't get past 40 FPS while on duty. I want to blame LSPDFR's optimization, but not sure that we can.