As commonly used in all three services in the UK, a great new addition would be minibus'. Not sure how much they are used in the US, but they are used to transport roughly 12 personnel, to large missions, between stations and events in the U.K.
Police - https://farm1.static.flickr.co…53980240_f76d9d8473_b.jpg
Ambulance - http://www.ukemergency.co.uk/photo/p1330238.jpg
Fire - https://farm5.static.flickr.co…63644784_06a1c681a0_b.jpg
Another use in-game would be to transport personnel to training courses
Like I say, don't know how much used they are in Europe and America, but in the U.K. they are very common and would add even more realism
