While Oak+Street continues over the Fraser River as a bridge, there is no Oak+Street+Bridge (OSB) over F. Creek. The city foolishly never even allowed for future clearance for a bus & bike bridge over F. Creek. From the Fraser River to F. Creek, Oak Street should have been mostly for northbout travel.
Right now the Oak Street and Granville Street corridor is 12 lanes. That's because they are both 6 lane streets. Simply by moving the centerline over one lane & they each can provide 4 lanes one way & 2 lanes the other way.