[x]

Isn’t there an I-666 in New Mexico or something?

That's US Route 66. It's not an interstate.

“President Barack Obama Tollway”

Kind of appropriate that they're making you pay to drive it.

[SaveFerris]

Nope there was a highway 666 maybe not I-666, as you say, not an interstate. So I should have left off the I-.

I think it was in New Mexico. Folks were afraid to drive on it. It was a docu-drama series long ago that did a story on it.