I posted a pic in the gallery recently showing a narrow gauge steam train on the dual gauge (891 mm/1435 mm) line between Jenny and Västervik.
Today I found a movie from that line, filmed from a narrow gauge railbus the same day I was there.
http://www.youtube.com/watch?v=2aPI8GUJJGY
Västervik-Jenny.
In the beginning they talk about that if an elk steps up on the line in front of them, the driver will leave the cab first
And then in the end, they talk about that two green lights mean "Clear, maximum 30 km/h" on the narrow gauge but "Clear, maximum 40 km/h" on the standard gauge.