Biking on the roads in Norway means you have to follow much the same rules as cars and motorcycles do: Keep to the right, give way to those coming from your right, and don’t drink and bike. The same traffic regulations and road signs apply to you as to cars and other vehicles on the roads.
As a bicyclist you have some more options, however. You may bike on the pavement if no bike lane is available, as long as you adapt your speed to that of the pedestrians. You may bike across pedestrian crossings, but cars will not be obliged to stop for you unless you dismount and cross the road on foot.
You may not bike on motorways and dual carriageways, as well as in some tunnels. This will be clearly indicated by traffic signs.
Before you turn left or right, indicate the direction by extending your hand. You may not bike against the direction of traffic in a one-way street, unless permission to do so is specifically indicated on traffic signs.
Always wear a helmet when biking. Wearing a high visibility vest is not mandatory, but is still a good idea. Also note that only children under the age of 10 may be carried as passengers on a bicycle.
By all means, enjoy Norway to the fullest, but be careful while you do so. After all, we'd like you to come back and see us again, and enjoy the rest of what we have to offer.
There is much to enjoy among the peaks, valleys and plateaus, but the beauty and serenity can quickly turn dangerous. Make sure your training, your knowledge of the area, and your equipment, are all equally well suited for the trip.