We will be visiting Wengen in mid September. We'll be coming from Lake Como area and probably won't get there until 5-8pm. What are the road conditions like in Switzerland at this time? Will driving be treacherous if dark outside? Are the highways/roads (fastest route) twisty through the mountains? Or are they just regular straight highways?
Google Maps says it will take about 4 hrs to get from Bellagio, Italy. And ViaMichelin says 5 hrs. Which do you think is more accurate? The drive will be on a Tuesday afternoon/evening.