[Yo-Yo]

Yes, you are correct. But in the 1960s, in-ground wire guidance was probably the only technology with enough precision for the purpose, and it was only a demonstration program.

[ProtectOurFreedom]

Correct. That’s how the “Intelligent Transportation System” R&D started out for highways, too. They were going to have guide wires and central control of all vehicles instead of autonomous, GPS guided vehicles that were aware of each other. That ITS concept was completely impractical.