FWIW, I tend to start my passes about 350’ out. Earlier than others expect, but statistically worthy.
I sure get a kick out of left-laners who think I’m asking permission.
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The only real trick these days is avoiding the packs. The stupids. There are always gaps between them. Your travel speed is irrelevant. The Below always applies
1). Get them around you. Cancel cruise.
2). Leaving a stoplight at the edge of town? It’ll take the stupids THIRTY MILES to separate. Just drag along till they’re gone. Same for increased speed limit. Wait MORE THAN five miles.
3). Same for construction.
4). Once within 75-miles of a metro center, you’re in that traffic. Back down.
You’re doing it right when you always have a half-mile around you. Today’s computer-control multi-speed trans vehicles make being smooth really easy. Fuel efficient despite changing from steady state to manage traffic around you.
Why are Interstates “fast”?
It isn’t the upper limit.
1). Limited access
2). Non-stop
It’s all about average speed (barely related to travel speed). Under 300-miles in a day , and 68 isn’t faster than 60.
Do the test. Engine run time versus the clock.
You’ll waste more time with the TV channel changer that same day