A 3 lane bridge, viaduct or tunnel can be great if its for one direction. However, if it's for 2 way traffic, it can easily get very congested, unless its in a rural area.
The Johnson_Street_Bridge in Victoria, BC & the Lions_Gate_Bridge in Vancouver, are quintessential 3 BC lane bottlenecks. How is this possible? Make sure that a bus & HOV tunnel or bridge isn't built next to them. Especially make sure that a heavy rail or a light rail tunnel or bridge isn't built close to them. Thus, both crossings are fine examples of BC congestive planning. It's also crucially symbolic, as BC has been refusing to keep up with urban transportation needs. Thinking big & building big in Texas is no problem, because it's so far away from the backwater BC planning mentality. However, even Alberta & Washington State never seemed interested in taking a backward BC approach to things as well.
If you are from Montreal & haven't visited Vancouver or Victoria, nothing can prepare you for the shock, if you ever do. As preparation, it might be good to drive over to Jacques+Bizard+Blvd and then over the 3 lane Jacques_Bizard_Bridge. Of course this is in a backwater part of Montreal. However, imagine if this 3 lane bottleneck was at one of the main crossings in Montreal. Well, that's what you would have to prepare yourself for, if you visit Vancouver or Victoria. Whether its a low level bridge or a high level bridge, as long as it's a 3 lane chokepoint, it meets the BC standard. Fortunately, Montreal was able to build a new bridge there, simpy because it doesn't have a Vancouver like mentality. https://montreal.ca/en/articles/building-new-bridge-pont-jacques-bizard-26379
The Windsor+Bridge is a backwater, 3 lane Sydney crossing. Just imagine if that was on the edge of the CBD. Well, if you are from NSW & you visit BC, nothing can prepare you for such narrow bridges, short trains & stumpy buildings. Fortunately, nothing like the BC mentality was allowed to take over NSW.
If you are from New_Haven,_Connecticut, you might be shocked if you visit the 2 largest urban areas in the BC part of Canada.
https://www.google.com/maps/place/Ted+Smout+Memorial+Bridge,+Brisbane,+Australia
"The bridge features
- 3 traffic lanes (originally 2 for regular traffic and a T2 (bus, taxi and vehicles with more than 2 occupants) lane, but the T2 lane has now been converted to a regular lane).
- A 4.5 m (15 ft) wide pedestrian and cycle path that connects footpath and cycle networks on either side of Bramble Bay. The path is separated from traffic by a concrete barrier." https://en.wikipedia.org/wiki/Ted_Smout_Memorial_Bridge Of course after duplication, it became a 6 lane crossing.
