Pretty interesting here, on the exits they have 250w HPS on the main road, but on the exits they only have 100w HPS (With some 250 occasionally mixed in) fixtures on small upsweeps instead of truss arms.
In Ontario, The exits have their own highmast lights if highmast is used on the highway or shorter light poles if they're using cobras. I haven't checked the wattage of the fixtures yet though.