Slopes of 8 degrees is about the maximum you will see on the TransAm.I think you'll find a lot of people who would dispute that.
John, there are probably few people who are more knowledgeable about the TransAm route than you, so I reverently give way. Still I tried to remember where those wickedly steep slopes occurred. Maybe in Kentucky, where the adrenalin from the many dogs in ambush drove me over the hills?
Did your remark take into account that I mentioned a slope of 8 degrees? More often slopes are expressed as the ratio of rise over run, which for an angle of 8 degrees amounts to a grade of 14%?