One of my neighbors in UA was an engineer on the 270 project back in the 60s. I LOL'd when he said it was originally developed to be an OUTER-BELT; back then they didn't think that people would continue doing major development outside of 270.
Waiting for plans to do an I-870 route making a ring from Sunbury through Newark, down through Hebron and Lancaster...over to Circleville, and back up through Plain City.
OT, my neighbor and his wife lived in the same house since he had it built by Sears Roebuck in 1958!