Let's suppose you have a highway.
It's speed limited, but since there is no further protection, people are speeding.

Speed limit is set to an even lower value, people keep speeding.
"Warning", "Danger", "Beware" traffic signs are installed, people keep speeding.

A system for catching speeders is installed, but after a short time people just drive car by car on several lanes and continue speeding, because now it cannot be detected which of the car was too fast (actually both were, but there is no proof).

So that didn't work out. Next step is to place some sort of station where you have to register before being allowed to use the highway. Additionally you are required to have a speed limiter you have to turn on each time you want to use the highway. Of course it's a special verson, so you need to buy it before and can't use it on the other highway.

Now what happens?

People you were speeding before just hide their vehicle id and continue speeding through the sand next to the highway bypassing all installations.

People who always drove with the right speed, long ago moved to another highway which takes them to some similar place they initially wanted to go.