I did a quick google and it appears a stationary object is covered as a collision. But that means your rates could go up. Apparently, you're supposed to be able to avoid stationary objects. And those cars behind you? They're supposed to maintain a following distance to allow them to react to whatever you do. If they hit you, then it's their fault.Oh come on, that's silly? A Road Hazard causing damage to your insured property doesn't have to exhibit movement to be covered under your Collision or Comprehensive policy.
I'm not saying that's what you should do, I'm just explaining "insurance theory" which doesn't have all that much in common with what's safest.
Bottom line. I wouldn't make a claim unless it's either quite expensive or something you can't handle yourself. If it's not much above the deductible, don't bother.