Doing some preliminary research into highway-spanning pedestrian and cyclist bridges, like the one on the books for Hamilton's crossing of the QEW highway, I just had to share the Region of Waterloo's transportation web page - they make a real effort to present the transportation options equally, and there are clear and prominent links to cycling and walking pages. Compare with the city of Hamilton page
So what about the preliminary research? - well, at this point the cost to span the 401 in Waterloo Region: $1.7 million. The projected cost for Hamilton's crossing of the QEW: $8 million.
Any thoughts on the price disparity would help. Is the QEW crossing 4 times the size of the 401 crossing?