If you have a smart-phone, google maps with live traffic turned on will show construction backups as red (roads moving normally are green). Just keep your phone plugged in as GM's sucks the life out of the battery as it tracks your location.
The Allstays Camp and RV app uses GM with live traffic as the base layer then you can add other points, such as campgrounds, truckstops, rest areas, Walmarts, etc. using the filter feature of the app, so you can not only see traffic conditions but also what's coming up along your route.