“Kansas followed the Texas plan, buying a wide enough swath of land for the high-speed interstate artery plus room for parallel service roads,” says Kerr. “Missouri just bought enough land for the interstate route and diamond intersections, and didn’t connect those diamonds from point to point.”
http://kcur.org/post/after-30-years-i-435-more-success-story-kansas-missouri#stream/0
I drive I-435 on the Kansas side nearly everyday. And I remember before it was completed and you couldn’t drive completely around the 81-mile circuit. I’m thankful my home state took the long view instead of being shortsighted for future generations.