We drive HW7 quite often to Peterborough ... there are 'enough' cops to worry about, but not a great deal. You will probably find though that the traffic on the 7 can often get backed up if you go on a busy day. Between Perth & Peterborough there aren't a great deal of passing options, so sometimes you get stuck behind the dolt doing 60-80 and it's just a PITA.
