The Alex_Fraser_Bridge was opened as a 4 lane chokepoint, right from the start. No need for any express_bus_lanes or rail rapid transit, as that would conflict with the congestion planning agenda.
"Upon opening in 1986, only four of the six available lanes were open. Cyclists and pedestrians share two narrow sidewalks one on each side. All six lanes opened in 1987 after traffic demand justified the need." https://en.wikipedia.org/wiki/Alex_Fraser_Bridge#Overview
Eventually, the AFB would have 7 lanes, when it should have been designed to have 8-10 lanes. A provision for a lower transit deck would have been nice, but there isn't a vision for an efficient transportation network.
https://en.wikipedia.org/wiki/Port_Mann_Bridge#History It opened with only 4 lanes & no emergency lanes. No provision for a lower deck, but a 5th lane was eventually added. So many times, an inept 4 lane BC bridge that is supposed to be a major crossing, is subjected to the congestive planning agenda.
https://en.wikipedia.org/wiki/Port_Mann_Bridge#Dismantling_of_original_bridge
