Found this project that is similar to my proposal, but this is more of a network design rather than architecture. Ideas seem vague but worth to look at though!
"Increasing the movement of people, not cars should be the goal of any public transit initiative. For this ambitious project, Gensler Los Angeles proposes an integrated set of ideas to adapt the current system to improve its performance at the various scales based on user needs. The belief is that a more responsive system and an improved user experience ultimately leads to the means to meet that challenge."
Check out the video:
