I'm not sure. I think it does follow I-35, at least it does through Texas, but I'm not sure how far north it goes or how closely it follows the original road.
My point was that EdCondom's post was a way to conduct a cheap attack on the truthers without going so far as to address their argument - basically something at the level of a Republican smear. I don't follow the truther stuff closely and it was even offensive to me.