S.S. Marie to Sudbury is good 2 lane highway with several areas where there is am extra passing lane. Sudbury to Niagara Falls, other than a small stretch not too far south of Sudbury, is pretty much divided highway all the way with a 100 KPH (62 MPH) speed limit.
Not a lot of fuel choices between Sudbury and Parry Sound but there are some stations. What I like to do is fuel up at the Esso in Nairn Centre and then that gets me all the way down to the Barrie area where there is lots of choice. If possible avoid the Shell station in Pointe-Au-Baril, it's one of the most expensive in the province.
