I always take I-59/I-20 to T-Town for the game. Are there any potential delays caused by road construction between Gadsden and T-Town that I need to plan for?
Yep, they're doing major bridge work around Mile 79 (Cottondale Exit). It's the same two lanes it always was, but somehow people can never drive in their lane at the same speed with neat big machines to stare at. For an 8:15 KO it should have minimal effect on time, but after you pass Mercedes be especially ready for traffic to slow or stop.
I'd get there super early and enjoy the pre-game environment, but your problem is going to be after the game when most of the 100K+ folks will be headed back toward B'ham. Of course, this is always the case until they get 20/59 widened to about 5 lanes between T-town and B'ham.