What an odd response to an overturned truck...
Agreed. Closed airspace for a truck crash? I've heard of that a couple of times if there was risk of a significant explosion or fire - like fuel/chemical trucks or trucks carrying ordnance - but for a "routine" truck crash?
The story says around mile marker 144. Now that could put it near the approach to runway 23 at Fairmont Municiple Airport but it seems odd.