TDOT Smartmap
Looks like there's a bunch of construction pending along I-40 btn mm 225 - 232 each day, all of wilson county and then btn mm 235 - 241 and at mm 273 - 287 and mm 311-318 at night.
Watch for HORRIBLE traffic around Nashville; if you're coming from the north, take Briley Parkway to avoid as much as you can.
Hope this helps! Looking forward to seeing you there.