How were you able to get the one-ways out of the Tiger data? The best I could see was a guarantee that a road was a two way, but nothing to determine if it was a one way -- the difference between divided, undivided, separated, and unseparated from the Tiger fields (basically whether each direction has a distinct edge in the data or not)

That's still work-in-progress. There might a way of giving a good guess whether road is a one-way or not, but there probably are cases where it does not work. That's why all streets are classified as two-way, for now. Though, the software has support for one-ways, if I just figure a way to determine that from the data.

Kim