If we're looking at pas examples, the reverse happens a lot more: rules and environments are made stricter with stronger passive enforcement to get rid of the infractions.
Setting automated speed traps where drivers don't respect the limit, physically forcing lower speeds where traps didn't work or closing whole streets to regular cars to get rid of the problem altogether.
The main issue isn't just the rules, and if the infrastructure has to be adapted as well, it's often cheaper to get rid of traffic than to rethink a system that work better in adversarial situations.
Setting automated speed traps where drivers don't respect the limit, physically forcing lower speeds where traps didn't work or closing whole streets to regular cars to get rid of the problem altogether.
The main issue isn't just the rules, and if the infrastructure has to be adapted as well, it's often cheaper to get rid of traffic than to rethink a system that work better in adversarial situations.