Part 2 is an intro to rail bridges and bridge engineering. There was no discussion of the details of the bridges in this project, and it only covered the range of bridge types that might be used.

The cost estimate and next steps are included at the end of this section. There is an episode devoted just to the latter two if you aren't interested in bridge engineering.

The project website is here:

https://www.sccrtc.org/projects/rail/zeprt/

There is a version of the video there.

The RTC's Youtube channel with the video is here:

https://www.youtube.com/watch?v=vCJdqxnU0jA