This one for example: https://m.youtube.com/watch?v=PB_9Va0fx_o

3 minute video that explains why adding more capacity never solves the problem.

Please read how induced demand works. There are plenty of videos on YouTube about this topic. Adding more lanes, bridges, etc solves traffic only on the near term. In the long term it will never work.

Ask yourself: how come that we still have traffic with those fancy multi lane highways? How come adding more lanes did not solve the traffic?

Have you heard about the term “induced demand”?

Less traffic -> motivates new development -> more population -> more traffic.

Have you ever used light rail service?