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Originally Posted by Kham  i'll go with Randy because he's been around as long as dinasaur. 
my question is how do you determine if 55 works for every cars and especially modern cars? where exactly does aerodynamic comes into play for 18wheelers and for prius for example? i say start with 18wheelers. too many of them on the roads. then there's traffic congestions each days for each cities. that's gotta count for something. how do you solve that without going broke. |
You want to get the 18 wheelers off the roads? What would you replace them with? I think the only thing more efficient at moving freight would be rail. Tractor trailers are quite fuel efficient for the job they do.
The Prius is not a lot better than a Yaris above 50mph. It takes a lot more HP to maintain interstate speeds than driving 20mph in city traffic.