ODOT Interchange Drawings

[rte66man]

http://www.okladot.state.ok.us/traffic/intersections/

Not what I expected, but interesting nonetheless.

[TheStranger]

Although the PDF itself doesn't show it, this URL here was mildly amusing:

http://www.okladot.state.ok.us/traffic/intersections/0500008%20I-40%20&%20US-66.pdf

[Alps]

The OK SR I-40B shield, also amusing.  Those are similar to NJ's Straight Line Diagrams, which offer interchange line diagrams drawn on an aerial background.