The I-40 relocation project reminds me alot of the reconstruction of I-30 to the south of downtown Fort Worth. Just like 40, I-30 was realigned several blocks to the south and subsequently creating a nice landscaped boulevard (Lancaster Ave?) where the old I-30 elevated lanes once stood.
This should definitely benefit the Bricktown district! I'll be in OKC in July, for the first time in 8 years... I can't wait!
Here's a map and set of photos of the I-30 Fort Worth project:
Demolition of the old I30 elevated lanes, with the new freeway in the background