Issue description

Please see the attached screenshot
The green is the path train chose (it's a 1-4-1 train if you need to know), the red is the path that i intended for it to take
My assumption is that the pathfindier sees a steep incline and assumes that the train is gonna go very slowly up said incline
However that is not at all the case, as the incline is very short and the train doesn't slow one bit going up it.
It would be really good, if the pathfinder could account for it, as right now it seems that any overpass will be avoided, in favour of a much slowel path that doesn't have an incline
Savefile attached just in case.
Reproduction steps
myGame.save
Open this save file
The camera is pointing at a train that is taking the same route
Check it's navigation
See that it takes convoluted path instead of a bridge
Game version and build number
v0.7.2 b432
Operating system
Windows
Files not imported: myGame.save