Yep, sometimes there are hills that also cause trains to go faster or slower depending on the incline. Fascinating world out there. Speeds are regulated.. Here

Yep, sometimes there are hills that also cause trains to go faster or slower depending on the incline. Fascinating world out there. Speeds are regulated.. Here's some reading: https://en.wikipedia.org/wiki/Rail_speed_limits_in_the_United_States#:~:text=Signal%20speeds,-Learn%20more&text=Federal%20regulators%20limit%20the%20speed,(See%20dark%20territory https://en.wikipedia.org/wiki/Rail_speed_limits_in_the_Unite....)