[sfn42]

1. All the more reason to be on the lookout for kids in the road etc.

2. All the more reason to slow down, you can't drive if you can't see.

3. All the more reason to slow down. Especially if you have to spend time looking at the map.

Yes, it was a more difficult driving experience than a familiar road on a sunny day. So you slow down. That's what being a responsible driver means. If you just gun it with no idea what's up ahead you're going to end up in a river or worse, hurt someone else.