Its unfortunate that the Iron Bridge wasn't designed to support a future upper or lower deck. This could have provided an additional 2 north & 2 southbound lanes for buses and trucks. Plus, an LRT line with a north & southbound set of tracks.
http://www.railforthevalley.com/latest-news/yippee-vancouver-is-number-one
http://vintageairphotos.com/tag/second-narrows-bridge
