I guess it depends on the location. More lanes don't equal better traffic. In my city, every road is pretty much a 2-3 lane highway for cars, and it seems like a huge waste of space. Invites speeding, crashes.
There's been road diets, where they've been reduced to single lane, and these had had no effect on travel time. Did reduce crashes a lot, less of that aggressive jostling for position, just cars chugging along calmly in single file.
There's been years long construction on a few big buildings, blocking whole lanes, forcing cars into single file; absolutely zero effect on travel times.
When there's snowfall, only middle lanes are cleared. Zero effect on traffic flow.
Imho traffic flow is pretty much determined by number of cars and number of intersections, and very little by number of parallel lanes. So much room for dedicated bike or bus lanes, it's really AND/AND, really everybody wins, and it's such a tragedy that my city just doesn't seem to understand that. All it takes is paint and bollards.
There's been road diets, where they've been reduced to single lane, and these had had no effect on travel time. Did reduce crashes a lot, less of that aggressive jostling for position, just cars chugging along calmly in single file.
There's been years long construction on a few big buildings, blocking whole lanes, forcing cars into single file; absolutely zero effect on travel times.
When there's snowfall, only middle lanes are cleared. Zero effect on traffic flow.
Imho traffic flow is pretty much determined by number of cars and number of intersections, and very little by number of parallel lanes. So much room for dedicated bike or bus lanes, it's really AND/AND, really everybody wins, and it's such a tragedy that my city just doesn't seem to understand that. All it takes is paint and bollards.