Regarding emergency vehicles, found this, but haven't seen videos of it actually in action http://www.freepatentsonline.com/20160252905.pdf http://www.freepaten

Regarding emergency vehicles, found this, but haven't seen videos of it actually in action http://www.freepatentsonline.com/20160252905.pdf http://www.freepatentsonline.com/20160252905.pdf