Around my section of Virginia you have a choice between the Interstate at 65-70 posted and the older US routes at 55-60 posted. The older routes are pretty much deserted while the Interstate can really slow to a crawl, sometimes less than a couple of miles in an hour getting past another wreck.
I prefer the older routes, but with the heavy traffic on the Interstate, if you can get behind a larger vehicle you can get the same mileage as you would at 55 without a draft. In heavy traffic separation gets down to below 100 feet AVERAGE which requires extreme concentration and the ability to react very quickly to avoid debris in the road.
Not really a fan of gubbmint regulation, but I think a well enforced 70 MPH limit is good. It was that speed 40 years ago when cars had drum brakes and compared to today they were deathtraps. Of course a lot more people died on the highways back then.
regards
Mech
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