Great directions from Microsoft (to be fair to MS, the UK rail mapping system is just as dodgy):
1) Click here
2) In the Start section, select "Norway" from the listbox and enter "Haugesund" into the "City" field.
3) In the End section, select "Norway" from the listbox and enter "Trondheim" into the "City" field.
4) Click on "Get Directions".
It’s scenic. Especially the big road round the major city. Should any Norwegians attempt this, I recommend you pop in and say hi…