I think it would be cool to add a Code Green, Amber and Red system to Ventura, as a UI- either above the map bottom right, top middle of bottom left.

The main reason isn't just for "realism", but to help control how many major incidents are happening at once by letting people know at the top. Sometimes it can feel like there's loads of big scenes going on at the same time, which can spread police too thin and make situations feel less important.

so..
Code Green
Normal city operations.
Regular RP and crime.
No special restrictions.

Code Amber
Increased criminal activity.
A limit on how many major incidents can be active at one time.
Encourages people to focus on ongoing scenes rather than stacking multiple major events.

Code Red
Major city wide threat.
Only 1 major incident can be active at a time.
Examples could be active shooters, hostage situations, major robberies, coordinated attacks, etc.
No new major incidents can be started until the current one is resolved.

I think this would make major scenes feel more important and give emerg services a chance to properly deal with situations instead of having multiple large scale incidents happening at once. It would also give higher ranking police something meaningful to manage and make the city feel more alive depending on the current threat level.