I spotted some nice pictures of the construction of the new Port Mann bridge who'll replace the current one near Vancouver and allows TCH-1 to span the Fraser river
http://forum.skyscraperpage.com/showpost.php?p=5104625&postcount=1879
http://forum.skyscraperpage.com/showpost.php?p=5110382&postcount=1885
I don't know Vancouver and the Lower Mainland of BC as well as Toronto and the GTA but it seems like the Port Mann Bridge is a massive bottleneck. How wide will the new bridge be?
The new bridge will have 10 lanes set in a C-D system and also include a path for cyclists and bus transit. Here the official site of the bridge http://www.pmh1project.com/