well the obvious solution (which i'm yet to try) is to get some one to drive at 30 in front of you... then when you've checked you speedo,flash them to go 40.. check your speed then flash them again to try 60.. etc...
with all this wonderful technology, something just need a bit of good old brain noodle and common sense...!
the main reason i rasied this point is because i drive an imported japanese sports car that was converted from kph to mph and i was a little concerned... |