This is what they need: https://www.autoblog.com/2013/05/15/clever-water-stop-sign-prevents-tunnel-crashes-in-australia/

goes up empty and uses regenerative braking to control speed coming back down loaded. [Found it](https://www.autoblog.com/2019/08/26/edumper-electric-mining-truck-self-charging/)

Here let me google that for ya. https://www.autoblog.com/2019/08/26/edumper-electric-mining-truck-self-charging/

From the same year as your article, [Tesla employee satisfaction ratings slip amid cost-cutting, layoffs](https://www.autoblog.com/2019/06/10/tesla-employee-satisfaction-ratings-slip/) : > At jobs site Glassdoor, Tesla's overall company rating fell