Enforcing a speed limit on freeways is completely possible. They&#x27;ve got it done in England. What you need to do is capture license plates on entrance and exit, and calculate the average speed for each car&#x27;s trip. If the speed limit is 50 MPH for traffic-flow reasons, and you do your 15 mile commute in 15 minutes, you&#x27;re getting a &quot;60 in a 50 MPH zone&quot; ticket in the mail, every single time.<p>People will learn in a hurry that speeding is pretty much pointless and self-harming.