Hertz gave you up because: 1) if they don't, they are responsible for the ticket; and 2) you agreed to that in the contract you signed when you picked up the car.

If you don't pay, Hertz is on the hook for it. That's fine except that you also agreed to make good on any such tickets and associated fees. Hertz will pay the $236 and tag you for a whole lot more in additional administrative fees. And, remember, you've authorized them to debit your CC, so the chances of beating this by ignoring are kinda nil.

And, ignore the malarkey about "serving" speeding tickets.

If you want to contest the ticket, that's fine, follow the process. If not, better to pay now when it's only the extra $30.