Adds police on foot and in vehicles throughout Los Santos. Updated in v1.37.

Replace popcycle.dat in "update\update.rpf\common\data\levels\gta5"

Recommended to open "settings.xml" in "Documents\Rockstar Games\GTA V" and change    

<VehicleVarietyMultiplier value="1.000000" /> to "2.000000" 

This will help with there being lots of cop cars on the road.
Go even higher if you still see them a lot, it does increase VRAM usage slightly however. - The games VRAM bar lies about this setting, check GPU-Z.