I think you will find that the plans are to use them.
Careful now as the appliances are very powerful and I hate to think of the consequences of them being driven by someone, no matter how experienced at driving but with minimal training on the actual vehicles. One of these being driven at 60 mph up a busy main street by someone being put in such a position will surely lead to disaster.
Please also remember it is not the appliances which put out fires, cut people out of accident damaged vehicles, deal with chemical incidents etc, it is the people in them.