I always used to wonder for years why there was such a gap in the even e/w interstates (specifically, between I-44 and I-64). Turns out the rules say you can't have a interstate with the same number as a US-Hwy (also even e/w but which start low in the north go higher towards the south) in the same state. Which is why there is such a gap throughout the middle of the country.
It's not a problem for the n/s odd Interstates and US-Hwy because of the national population distribution and this overlap doesn't occur.
Of course, there are numerous interstates that go out of zone, especially in a diagonal direction.
What would be the OKCTalk designation for this route?
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