This is one of the vehicles that can not be replaced:
http://www.hjordis.se/jla/rail/brand/DSCN4889t.jpg
In the beginning there were no road to Kiruna, except for the small road used when the railway was built. All transportation were made by railway. In Abisko, they had an ambulance on rails, to transport people to the hospital in Kiruna.
The vehicle on the picture is that one, and was the only one of its kind.