I came across this:
http://www.odot.org/maps/aadt/2015/UrbanMap.pdf
and was surprised to see that the 3 busiest roads in OKC were as follows:
I44 at NW 23rd St - 167,600
I44 at NW 10th St - 149,400
I35 at SE 15th St - 144,430
I always thought Broadway Extension would be near the top based on the complaining by Edmond drivers, but no, its highest AADT is 105,700 at Wilshere. That puts it barely in the top 20.
For Tulsa, the 3 busiest roads were:
US169 at 51st St - 123,200
US169 at 31st St - 106,379 (AVC)
US169 at 11th St - 105,300
The Broken Arrow Expressway (US64)'s highest count is at Memorial - 102,600