I64 is a good road but not worth a 60 mile detour.
Rt. 17 is a 2 lane road that sometimes goes to 4 lanes. Coming southbound, you don't hit a light until a left turn in Ovid. There are more lights as you approach Fredricksburg but traffic keeps moving. Traffic depends on what time you hit the I-95 interchange.
There is a WalMart on Rt. 17 just before you get to I-95 if you need a place to stop.
Tom and Katharine
'07 Winnebago Tour 40TD, 400hp Cummins
RVing for 19 years & 150,000+ miles