[lcuff]

I remember reading some time ago that there is a real difficulty running passenger trains and freight trains over the same rails. With freight, you can tolerate bumps at the rail-join points, and freight tends to create such bumps because the heavy loads push the rails slightly out of place. Also, freight routes should be limited to a 2% grade, whereas 4% can be tolerated for the lighter passenger cars. Have these problems been mitigated on the Koralm Railway? Anyone know how?

[joushx]

The rails are welded together (https://en.wikipedia.org/wiki/Exothermic_welding), so there are no joins.

[lcuff]

Interesting. I wonder how the expansion and contraction of the rails with changes in temperature is accommodated.