>>969631"Narrow gauge is a mistake" (AC 50/60Hz is worse though)
t. Japan
Pic sort of related as this is a portion of the Ou Main Line north of Yamagata Station that had the tracks on the right re-gauged as standard gauge for the Yamagata Shinkansen extension to Shinjou, the narrow gauge on the left is for Senzan Line that splits off at Uzen-Chitose