The craftsmanship inside is georgeous...but it's still a garbage truck. They aren't made for highway speeds so it's top speed is probably something on the order of 45 MPH, maybe 50. That's the problem with city bus conversions, too. They have plenty of low speed torque, but very little top end speed.
The guy/firm that did this conversion should go into Prevost bus conversions. He/they could make a lot more $$'s because there is a bigger market. I know there is a customer out there for this kind of thing, but in my mind's eye, that was a waste, pardon the pun, of some really great work and design aesthetic.