The fastest times have been recorded around 27 to 28 mph.As for "average", what does that mean in a vast, varying world? ... and does it mean only for 21 year-olds, or 61 year-olds?? ... etc.,...
30 mph Not likely. Even olympic sprinters don't get much faster than that. To find out how fast an average man can run just yell "free beer" at a tailgate party and then time how long it takes them...