I did not know that there were already electric big rigs on our highways. I wonder if they are government owned such as USPS .
The government subsidized and funded quite a few private trucking company ventures for testing. A few self driving trucks also,
Here in northern CA Pepsi Co has a bunch of Tesla big rigs on the roads. I’ve also seen Frito lay trucks which of course is part of Pepsi co.
UPS was testing fully electric big rigs probably 5 years ago. I saw one up close in the Dallas or Mesquite hub.