A closer parallel might be the London Underground, that manages 55-60mph. The new Elizabeth line is apparently going to go up to 90 miles per hour, but that is

A closer parallel might be the London Underground, that manages 55-60mph. The new Elizabeth line is apparently going to go up to 90 miles per hour, but that is probably only for when the train leaves London and heads out to neighbouring towns (it's essentially a subway line that also connects commuter towns to London).