Not a PHX area DISer (I live right next to DLR!) but I was just in PHX/Tucson last week visiting my family and the 10 bridge collapse wasn't bad in terms of traffic. Driving from Anaheim to PHX on a Sunday night it took about 5hrs and from Tucson to Anaheim Tuesday morning it took about 6.5 hrs. It is down to 1 lane each way for maybe a 1 maybe 2 mile stretch. They already paved a cut over from the eastbound side to the westbound side. I could see it might present a bit of a back up during busier traffic times just due to the fact it goes from 2 lanes to 1 for a short stretch.
They had already torn down the failed bridge when I went past this Tuesday, but no idea how long it will take for them to build it back up.