Rail networks

A large rail network will solve :
1. Transportation costs.
2. Pollution(electric rail).
3. Public Transport.
4. Road safety, by reducing load on highways.
5. Isolation of poor/rural communities.

>>6
you need to move the train to the uphill, negating any potential savings. IN fact most train tracks avoid elevation and stay flat on most of terrain(tunnels, bridges). Only a few train tracks in the world go really uphill.
https://en.wikipedia.org/wiki/List_of_steepest_gradients_on_adhesion_railways#Examples