Chris Lewis wrote:

At least in Ontario, 90km is very rare.

??? Hwy 69 and a couple of others (6 south Hamilton? anyway, not too uncommon.)
vary between 80 and 90 on different sections. I think it depends on who the
locals voted for.

But even if you are at 90, it's still easy to figure out time - do the calcs as
for 100 and add 10%.

BTW - it isn't divided that determines whether it's 100 or less - it's
controlled access (though every controlled access hwy is divided). I think the
determinant in deciding between 80 and 90 is the frequency of access - more farm
roads = 80, fewer farm roads = 90.

Mike