You can Google the Department of Transportation (DOT) for any state and get up to date information on traffic. I find these are very useful sites in planning a trip. When on the road I use Waze on my smart phone. If there's a traffic accident or delay for construction, Waze can find an alternate route for you.
We were coming back from Texas and Waze told us to take an exit while the Garmin said to keep going. We got to the exit and you could see traffic at a dead stop (Waze shows this as red on the road, yellow for slow.)
We took the exit and followed the instructions, getting back on the Interstate right at the scene of the accident, ahead of all the other cars. It was a bad accident and Waze saved us from being stuck in it. I don't leave home without it.