http://lmgtfy.com/?q=highway+11+upgrade+ea
specifically, http://www.highway11study.ca/pdf/Highway 11 Study Design Report.pdf (warning, large PDF) Can't seem to find the EA for the portion south of Washago.
Very interesting, thanks! I wonder what the final tabs would be on the upgrading 11 vs building a new corridor between 11 and the 400. The new corridor from the 400 to Gravenhurst would certainly be simpler from a dealing with property owners perspective, but I don't know if it would be less expensive or not.