Originally Posted by swag

No eclipse experience myself, but I'd assume the worst traffic happens when a major city is outside the totality band, but within ~100 miles or so of totality. That puts a ton of people on the road. That's what Oregon had in 2017.

This one, with the whole Metroplex getting 2+ minutes of totality, I'd expect most folks will just watch from their own part of town. (Assuming uniform weather in the area). Some diehards will journey east or south of town towards the max areas, so traffic from those spots back to the city will be heavy. I-20, I-35, I-45, US-80, US-175. But I wouldn't expect the traffic to be too bad for the interior of the metro, say, west of 635 north of 20.

Post-eclipse flights may be full, so allow extra time for security, etc.