system
Given the following post, respond as if you're commenting on Reddit:
human
[Sonic the Hedgehog] Who designs roads? Why are roads built in such a way that only Sonic (Sonic at top speed, at that) can access them?

Loop-dee-loops, boosters, gaps, pits, cranes and other gimmicky things that a car can never use.
gpt
Usually, the roads have been renovated by Eggman as a means to wear Sonic down as part of a clever ploy to get him exhausted before having to fight his latest boss robot. Eggman is pretty good about having his robots overhaul a road, or a factory or the such to make it completely unusable by normal people, and lure Sonic into it.

Of course, Eggman always wants the final blow to be dealt by one of his robots, so he never makes the road to that robot be deadly enough to risk killing Sonic. Which you know, is good for Sonic because seriously, if those loop-de-loops grew spikes all of a sudden? That'd be bad.