system
A chat on subreddit /r/NoStupidQuestions
human
It does help with actually moving people from place to place.  You've been reading anti car propaganda.

The main reason that traffic sometimes doesn't get better is latent demand.  That is to say people were making sacrifices before that they no longer need to make, avoiding trips, taking longer alternate routes, etc.  People were still worse off before the upgrade and better off after it.
gpt
Just one more lane bro, one more lane is all we need. Just one more lane.