Went to Missouri today, Z to D to T to TT.

TT is essentially one big long hill until you get to the Missouri River bluff, then it pretty much just plunges down the bluff. Oh, they can call it a hill but it's a bluff. It's the edge of how far the Ice Age glaciers got, with the key word being edge. Missouri then came along and built a road over the edge.

Yes, Z to D to T to TT -- only in MO.