Cars are getting faster...
Back in the 70s, cars running to 60 in 4 seconds was unheard of. Now, it's a common thing to have. Back in the 60s, cars could never pull more than .9 lateral G. Now it's common in sports cars.
Cars are always evolving/changing/being upgraded to be faster, quicker, and nimbler. But, eventually, cars will get to a point where it's not horsepower that's a limiting factor, but rather the driver. Had there been zero restrictions in a racing league, cars would be much beyond their human counterparts. But, relying on the theory that cars will always be getting faster, humans must also become more 'tolerant' of Gs being thrown onto them to keep up with the ever-faster cars.
But, it gets to a point where the human body just can't take anymore. You or I could not take a corner at full automobile potential, seeing as how it would force 7 Gs onto you. You would literally die doing so.
The only way to make cars faster and faster withou these limitations would be to make them driverless, or video game style. But then you lose a certain factor to racing that makes it so appealing.
Like it or not, this is going to happen sooner or later. So what can we do to keep up with cars that have so much more tolerance/potential than us?
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A good reading that gave me this idea;
[url]http://www.popsci.com/popsci/futurecar/06f09aa138b84010vgnvcm1000004eecbccdrcrd.html[/url]