Not necessarily - rush hour spacing on the New York subways can be minutes or less with one train pulling out of the station as the next pulls in. That's high frequency, but they don't excede 55 miles an hour, with average speed being 17.4 mph.
And it's not even an election year.
https://www.railjournal.com/passenger/main-line/expressions-of-interest-called-for-canadian-high-frequency-rail-project/
Is high frequency anything like high speed?
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