The logging line at Viseu de Sus has a variety of highway vehicles converted to rail use: vans, pickup trucks, etc. There is even a police van used by the border police to access the end of the railway that is near the Ukraine border. Not to mention steam tourist trains, and occasional steam powered logging trains. And wood burning steam no less. For more info on this interesting operation (including some great photos by Bob Turner who wrote the most recent C&TS book) go to the link below, click on trip reports, page down to Romania, and click on the trip report for 2006.