It’s very busy during the day during tourist season (summer/now), but typically low traffic at night (can drive for half an hour or more without seeing another vehicle). When it is dark, you can usually tell well ahead of time when a vehicle is coming. Many of the tractor trailers as well as people living/working up north drive with off road lights that really light up the night when there’s no opposing traffic. You can often see the light coming for a couple minutes or more before you can see the vehicle.