Humanoid transportation

I am set to wondering if this trick might solve the battery-car problems of excessive weight, overall cost, limited range, etc, etc. Or

https://www.washingtonpost.com/news/energy-environment/wp/2015/12/30/this-is-the-fuel-nasa-needs-to-make-it-to-the-edge-of-the-solar-system-and-beyond/

...would it be too big... too expensive, even w/ gov't support...too risky, esp in collision...