Interesting list. For the Vancouver "winners", the prominence of Granville Street is interesting, but not surprising surprising as it is one of the three feeder routes into the downtown peninsula from the south over False Creek and all of the municipalities south of the city proper (Richmond, Delta, Tsawwassen, (South) Surrey, and White Rock). However, it's the locations of the bottlenecks that interesting, because they illustrate the classic problems with "stroads" (portmanteau of street [purpose is to support adjacent land uses and maximize land values] & road [purpose to move vehicles as quickly as possible and in the greatest volume allowable]). They are incompatible purposes and stroads do both poorly.
Granville Street is a route that is expected to act in some places as a road (and technically carries a provincial highway designation in places [Hwy 99]), while in other places it's an urban retail high-street.
For the section noted as #15 (Granville Street between W Broadway Street and W 16th Avenue), Granville Street is functioning as an urban retail high-street (
https://goo.gl/maps/QhZA19RYGZN2). It's supporting one of the most successful retail neighbourhoods in the city that can command excellent rents and boasts low vacancy, a-list tenants, and an authentic sense of place. It's worth noting, too, that there is a couplet of bypass streets immediately adjacent to this section of Granville Street (Seymour and Fir) that connect with Granville Street and tie into their own on-off ramps to the Granville Street Bridge. This has been the preferred routing for through-traffic since the third (the current) Granville Street bridge was built in 1954. Unsurprisingly, taxis prefer to take the slower, direct route straight down Granville Street and pick up a few bucks on the meter as a result from out-of-town arrivals on airport-CBD runs.
For #9 on the list (Vancouver, Granville Street at SW Marine Drive), Granville Street functions as an urban arterial highway and backs up southbound as cars merge from three travel lanes down to one on-ramp lane for the Arthur Laing Bridge (
https://goo.gl/maps/AHFCcEhaiAr). Northbound, traffic backs up as Granville Street switches back to being an urban retail high street with heavy signalization and on-street parking (
https://goo.gl/maps/Vpy9n7C7fVL2). There is also a perennially large volume of traffic that intends to take Southwest Marine Drive west towards UBC, which is another stroad of sorts that runs through a wealthy residential neighbourhood before turning into a 80kph highway to UBC.
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