Good point, adma...I don't know all the details, but it's probably because the area around Buttonville airport is pretty built up, and they just foresee too many problems with any expansion plus addition of jets....Why not just expand Buttonville?
Two new freeways are proposed connecting the 407 to the 401 in Durham Region. They'll be built along with the 407 extension to the 115 - the EA is going on now. A new rail link to the city is part of the Pickering airport proposal too, mostly using existing corridors.I wonder what transportation links the Pickering airport would require? Presumably, it would need a 400-series highway to connect it to the 401 (realizing that the site is next to the 407).