Probably 70% night driving, which I prefer. [As Chef mentioned, major cities are better at night, which is why I'm planning to arrive in Atlanta after midnight tonight], and it's also better for listening to whatever you use to keep alert. Audiobooks are all I use, and I'm fortunate to have never come close to falling asleep at the wheel. Instead of getting sleepy, I find my eyes going in & out of focus when it's time to nap , [and that's if I ignore the first sign of fatigue, which is irritability.]
'Know thyself' is really good advice, since we're like snowflakes: all the same, but all different.