How far is it safe to drive on a blown tire?

Not one foot farther then absolutely necessary to get your entire rig well off the traveled portion of the roadway when enough danger lurks, is the most logical answer. If you value your safety and like your rig/vehicle to stay in the condition it was immediately after the event had happened! The heavier the rig is, the less distance it's likely to go at even walk speed until the wheel rim cuts thru the tire carcass and ruins it too. Why is this even a question as the answer is so obvious. Driving 5 miles on a blown tire isn't even logical or makes any sense at all! Why do you think there's even exists such a thing as "Road Service" and why do think they carry high capacity jacks to lift vehicles, trucks, and RV's? The road service vehicles aren't just there for decoration on a road sitting close to a customer in need of their service!

However, a lot of dumb people do stupid things and suffer the consequences they created! Can't fix stupid!