Uncle/Neice railroad shenanigans

I did not understand a single [HYPERLINK BLOCKED] it’s obvious I have no idea how [I like trainsss] work apart from the choo choo…

Basically a 1% grade means that the elevation changed by 1 foot or meter for every 100 feet or meters travelled, or in other words, basically flat

Oh she really f**ked up them

Then*

Ahh?