Please give me a scenario, Tony.
Let's talk airplanes. For one thing, auto-pilot systems have been in use for decades, and planes (which already spend most of their time flying under the auto-pilot regime to maximize fuel economy) actively attempt to prevent human error as flight-control systems disallow pilot inputs that would cause an airplane to exceed its operational envelope. Auto-pilots even have the ability to land a plane - including cooperating with ATC.
Research has proven that flying under the auto-pilot is safer even during emergencies: Ace human pilots are, no doubt, amazing and can "out-innovate" a computer (think landing in the Hudson) but such emergencies are few and very far between and truly ace pilots are even rarer.
And yet, despite all that, planes include not only human pilots (which makes the rest of us feel warm and fuzzy) but also switches that allow those human pilots to turn off or override the much better and safer automatic pilot.
If this is the case in the much more controlled environment of commercial aviation, do you really think that the much more chaotic and insane automotive environment won't include an "override dammit!" Brightly colored switch?
fat people who eat themselves to death really only hurt themselves.
I can't fire a gun into traffic. Why should someone be able to drive a half-ton truck, 115 mph.
Perhaps I'm driving the truck on private land? Or a track? But that's not important. The fact is this: It's true that the government can dictate the technical specifications of the cars that drive on its roads and it could mandated a "fixed top speed." However, unless the government is willing to prevent the registration and use of older vehicles the restriction won't matter. All that will happen is that the used car market will heat up, as people look for vehicles that suit their needs and demands and not the dicta of some bureaucrat.
By the way, this silly argument of "why should you have the right to do X" is flat out fucked up from the get-go. The question should be "why shouldn't you have the right to do X?"
I can see some situations where grown folk may even need to push it to 80 or 85 mph. But honestly, can anyone list the situations where going OVER 100 mph is necessary?
"Necessary" is a loaded term. There are plenty of roads in the United Stares that can be safely traversed at speeds far above 100mph, and where massively increasing (or even lifting) speed limit makes sense.
Driving from Las Vegas to Reno or from Las Vegas to Phoenix there are many stretches of highway – effectively endless straights – where 65 and 115 are indistinguishable. By increasing speed and reducing the amount of time drivers spend behind the wheel, you reduce the number of fatigue related accidents (fatigue-related accidents outpace speed-related accidents by a factor of almost 6 when looking at highway and freeway incidents).
You suffer from the misconception that speed kills, just like you suffer from the misconception that guns kill. The indiscriminate and unsafe use of speed kills, just like the indiscriminate and unsafe use of gun kills. And you believe that since humans can't be controlled ex ante, the tool must be limited.
That's pretty fucked up.