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From my front porch I can hear vehicles travelling down I64 East-West at average speeds of 70MPH. A few miles west the speed limit goes from 65 to 70 MPH. My choice when travelling East is to use the Interstate or the older state and US routes at 55 MPH or 45 MPH for 7 miles, then a nightmare of traffic lights that would kill anyone's mileage.
Most hypermiling techniques become practically ineffective at 70 MPH, the peak speed aero drag would be atrocious if you tried P&G, with the exception of Basjoos type of aero modifications (it would be neat to P&G his car at 60-80 MPH and see what mileage you could get!).
On a motorcycle P&G at 70MPH would be worthless on flat ground. Given a drafting opportunity and some fairly strong grades that would change.
Craig's focus seems, to me at least, to be on the aero component of vehicle efficiency.
The last time I drove cross country was just before the National 55 MPH limit was introduced around 1973. In the western states the speed limit was 85 MPH on some stretches of road
My average speeds for all of my driving is close to 40 MPG, which is verifiable on my car using the distance travelled and time travelled component of the factory instrumentation.
I will never be the mileage champ on this forum since my average speeds are close to twice those of the highest (over EPA) drivers. Even Franks 55 MPH roads in my Insight meant close to 12-15 MPG better than averaging 70 MPH.
regards
Mech
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