I have this idea that stories like this brings to mind. I'd like to see those severe tire damage strips built into pavement, retracted. Attach to a radar. Someone approaches over a given speed (say 30 over the limit, whatever), they pop up. You probably don't want the full strip that shreds the tires instantly, because that would kill a motorcyclist, but puncturing the tires so they went flat in 60 seconds would be good.
For bonus points, put hidden security cameras nearby so you could prosecute the people who would inevitably come and vandalize the system.
You wanna go fast, fine, go pay your fee and run on a track.
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Work: the 8 hours that separates bike rides.