I saw 2 trucks rolled today (didn't witness them, but saw the aftermath). Both happened in a turn on the bottom of a hill. The weather is absolutely perfect (about 72f and partly cloudy skies) so that's not an issue. It's from drivers simply going too fast.
The 1st one is/was at the 21 milepost on I77 in West Virginia. If you know that road, you know where that spot is. Bottom of the long downgrade (5+ miles) with the long sweeping left hand turn (heading south) and the big valley below it (just before the rest area without bathrooms). The second is/was on I77 & I81 at the 75 milepost in Wytheville, VA.
Slow down fools - you're not in an Indy car...