The posted speed limit in Ontario on the limited access 400 series highways is 100 kph ( 60 mph ). These are multi lane highways, and I drive just under the limit, in the right lane, leaving at least 2 other lanes open to pass me. Somebody wants to keep kissing my rear bumper ? I gradually slow down, without braking, and drop my speed ever slower. BY the time I get to about 70 kph ( 45 mph ) they get the message and pass me. Then I resume my previous speed. With more than two MILLION accident free miles and 57 years of safe driving behind me, I learned a long time ago how to deal with that kind of driver.