Wow, this is really the money quote: "The current state of the design appears to depend on the placement of a one-foot-square grid of large bolts in the roadwa

Wow, this is really the money quote: "The current state of the design appears to depend on the placement of a one-foot-square grid of large bolts in the roadway. I've installed bolts into concrete, and it takes me several minutes to mark the hole, drill it, clean it out and pound the anchor into place. A mile of 30 foot wide roadway would have 150,000 bolts to install. Whee!" Unless these plates are as damage-resistant as military-grade armor plates, there's no way that they'll ever be anything but a novely.