Fort McMurray, Alberta

 

https://en.wikipedia.org/wiki/Fort_McMurray#Highways_and_roads They can do what they do simply because they aren't under BC control.

https://en.wikipedia.org/wiki/Alberta_Highway_63#/media/File:Fort_McMurray_Athabasca_River_Bridges_2.png If this was in BC, everything would be funneled into 2 lanes each way.

https://upload.wikimedia.org/wikipedia/commons/thumb/8/8b/Fort_McMurray_Athabasca_River_Bridges.jpg/640px-Fort_McMurray_Athabasca_River_Bridges.jpg Its not a big problem in many cities around the world to twin, duplicate or triple bridges. Of course in BC, the power-structure is always slow to infrastructure expansion projects.

https://upload.wikimedia.org/wikipedia/commons/thumb/8/86/Fort_McMurray_Athabasca_River_Bridges_2.png/640px-Fort_McMurray_Athabasca_River_Bridges_2.png

Fort_McMurray had a 10 lane crossing long before it would reach 75,000 people. Greater Vancouver was well over 2 million people before its 10 lane crossing was built. That is the Port_Mann_Bridge.

https://en.wikipedia.org/wiki/Alberta_Highway_63#Construction

https://www.google.com/maps/place/Fort+McMurray,+AB/@56.7315359,-111.397114,369m/data=!3m1!1e3!4m5!3m4!1s0x53b03aeeff1a4459:0x5c8133330dca74b7!8m2!3d56.7266598!4d-111.3790441

https://www.google.com/maps/place/Fort+McMurray,+AB/@56.7194885,-111.3967659,25723m/data=!3m1!1e3!4m5!3m4!1s0x53b03aeeff1a4459:0x5c8133330dca74b7!8m2!3d56.7266598!4d-111.3790441

Unlike Alberta or Washington State, BC really likes to funnel traffic into three-lane-crossings that should have at least double the capacity. The Vancouver & Victoria mentality has no control over Seattle & Calgary. Those are the two closest major cities to BC and its amazing to see how much larger their scale of urban infrastructure is.