Back many years ago, we were driving down a two lane highway in a good old Air Force blue Dodge van. Loaded with maybe 8 airmen. Down the center of the road on the yellow line were flexible bollards every couple feet. The area was under construction and the lanes were narrow, and the bollards were to keep drivers alert and in their lane, I guess.

Anyway. Idly chatting with the driver, I asked 'I wonder how sturdy those are, what happens if someone hits them?' A minute or two later, when there was no oncoming traffic, the driver jerked the wheel and put the van in the center of the road. BAM-BAM-BAM-BAM-BAM at 60 mph. Then back in our lane, glances in the rearview mirror, and calmly announces that they go down and stay down.

I nearly crapped myself laughing. What a crazy SOB. Still makes me chuckle at the memory, 30 years later.

There is no point to that story, really, although perhaps that modern flexible bollards like the ones you link to claim to stand back up if they get hit. But do they, if the car is doing 60 mph? Hmmm. Lucky for those bollards, I don't drive a big ugly blue Air Force van. And I'm too much of a rule follower.