This doesn’t necessarily increase traffic on the remaining lanes actually. With traffic there’s something called induced demand: The more lanes you add, the more people will drive just because driving seems like a better option than the alternatives. This in turn means that adding more lanes can increase traffic jams!
Decrease the amount of lanes and people will be more inclined to take the subway or the bus. Or bus to subway station and then bus from the other subway station to destination, because you can’t have as many subway stations as you can bus stations.
This doesn’t necessarily increase traffic on the remaining lanes actually. With traffic there’s something called induced demand: The more lanes you add, the more people will drive just because driving seems like a better option than the alternatives. This in turn means that adding more lanes can increase traffic jams!
Decrease the amount of lanes and people will be more inclined to take the subway or the bus. Or bus to subway station and then bus from the other subway station to destination, because you can’t have as many subway stations as you can bus stations.