Anyway that is their claim.  They claim a northern and a southern route across the U.S.  They are a commercial company that states their cross country routes have superchargers no farther than 70 miles apart on these two cross U.S. routes.  I don't have a link for their PR about the cross U.S. routes but I do have a link for their web site for those interested.  If nothing else it does show that EV infrastructure is slowly, but surely, moving forward.

https://www.electrifyamerica.com/?utm_source=bing&utm_medium=cpc&utm_campaign=EA_Cycle%201_EA%20Branded%20US49_Exact%20and%20BMM&utm_term=electrify%20america%20charging%20station&utm_content=EA_Cycle%201_EA%20Branded%20US49_Exact&gclid=CPD-7eehnOoCFZcofwodntcISA&gclsrc=ds