Having seen people drive over these, they are designed to flop around for this very reason, but usually don't stand up to anything faster than walking speed unless they're brand new.

So I'm sure quite a few didn't pop back up.

Either way, I'd make them pay for the entire row and use the money to make a more permanent barrier (that'll never happen in the US)

They're designed to be knockable and pop back up to accommodate street sweepers and energy* vehicles, but not assholes going full speed

Edit: was sposed to say emergency vehicles

It's a shame there's not the occasional solid steel bar mixed in with them.

You can see them pop up in some parts of the video. Regardless though, there's no way they aren't damaged by this. There's only so much wear something can take.