The Burlington_Bay_James_N._Allan_Skyway went from being like a 4 lane BC bridge to an 8 lane Ontario crossing. That took place from the late 1950s to the mid 1980s.
https://en.wikipedia.org/wiki/Burlington_Bay_James_N._Allan_Skyway#History
There is a point where it would be likely to have 2 HOV lanes or 2 bus lanes.
https://en.wikipedia.org/wiki/Queen_Elizabeth_Way#St._Catharines%E2%80%93Hamilton
https://www.google.com/maps/place/Burlington+Bay+James+N.+Allan+Skyway
