I know this idea has been brought up in the past, and on search the last discussion appears to have been from 2018 or 2019. So I figured I would revitalize the topic.
I think that in the game mechanics now, we have the ability to transport a mass amount of medical patients via mass casualty unit. So why not be able to do the same with PD? I think it's a common concept across the world enough to implement such an idea into the game. I'm not saying like a police bus where you can transport dozens of people, but starting off simple - being able to transport 4-6 arrestees to the station of your selection. I think it would make some of the larger PD calls with more prisoners easier to manage. Open for discussion from both sides of the argument.