No you still have to manually dispatch it.

Wouldn't be a bad idea though! Even though it would be helpful it would also be way too easy. Especially if your patrol units were already running their routes and randomly generated calls spawned in their vicinity. Only thing you'd have to do is spawn any extra units that were required.

Unless this were to be an available feature for Premium Membership then that would be great. Gives a simpler dispatch to police units and the game developers would get more buyers for coin packages.

I'd write a thread about this down in Suggestions & Improvements to get the communities input!

Putting this in the suggestions thread is a good idea. It would make the game more realistic and add the feel to the game that patrol vehicles actively patrolling and non patrol units returning to stations are paying attention to their surroundings. It's not as common but sometimes first responders do end up finding things by themselves and stop to help.

Of course if I while I’m patrolling I see a car crash or a theft won’t wait the dispatch to make my duty, I’ll call my self code 4 and request backup maybe

Might be cool to add a feature where patrolling vehicles discover missions while patrolling. Maybe an added coins boost or special missions to make them worth it...