You can do it. Tape the map to your handlebars, with target times marked for the turnings. If you are behind schedule you can take short cuts, like across Bristol from Kennedy to Hurontario, also straight up Hurontario. I dont think those roads are dangerous - there is plenty of room for fast cars to get past you. Plenty of caution is needed at the 401 on/off ramps, but this will only delay you a few seconds.