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> emissions and efficiency difference between 55, 60, 65, and 70mph are significant and cannot be understated

Wouldn't this be an argument for a higher EV speed limit?

Not unless you reallllllllly enjoy inhaling extremely carcinogenic brake dust and tire microplastics and rubber dust.

The efficiency loss at speed still applies to EVs due to friction and laws of momentum.

You typically don’t want different limits for different vehicles on the same highway. Although where I live trucks have a lower limit than passenger vehicles.

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