Tawnos
A guy with a bass
At this point, I'm inclined to believe you're trolling. A radius of anything is not measured by driving distance, as geometry as a study of math knows no concept of driving.
This isn’t entirely true because it isn’t a study of math, but rather a study of geography. I make custom wall maps on request by businesses as part of my job and there have definitely been “25 mile radius in driving distance” projects. Or 50 or 100. You determine all the driving distances out from a point and essentially find the average circle (when I say you, what I really mean is GIS software). In most cases, the driving distances in all directions are fairly close to the same. The circle is really for aesthetics.
That being said, the NHL territorial rights are explicitly straight-line distance, so the other poster is absolutely wrong. Just wanted to point out that the term radius is used both ways in the GIS world.