This was not at all a failure. They built a 1km experimental road. They gained valuable information about real-world performance and technical challenges. It's not as though they built a 100km long six-lane highway with unproven technology. They built a tiny one-lane trial to test a promising idea.
It was overhyped by politicians, but what isn't? Maybe they even steamrolled over engineering red flags. That doesn't mean it wasn't a valuable experiment.
It was overhyped by politicians, but what isn't? Maybe they even steamrolled over engineering red flags. That doesn't mean it wasn't a valuable experiment.