I-80 through Sacramento westbound...the construction zone.

That time of day is really hit or miss. One day it can be completely empty, another day it's bumper to bumper. Eastbound has gotten better because most folks know what to expect now. Westbound just changed, so it's going to be a headache. I'd take one of the detours and avoid the whole mess. They won't add that much time to the trip and you'll be less stressful.