[CraigJPerry]

I've seen the result of a driver unexpectedly doing just over 35mph on a moderately busy 70mph motorway. Not nice. I don't even think 35mph is that much slower really - trucks are at 56mph and they get along fine but 35ish resulted in all sorts of crazy last minute swerves.

It's generally wise not to do anything other drivers will find surprising and I guess 35mph on a motorway falls in that category.

[monocasa]

Around here, roads that have a maximum speed that fast generally have a minimum speed in the 45MPH range too.