The control screen in the car shows all Tesla chargers, how many are working and how many are available, It is updated live. When I plan a trip, I tell the car my destination and it shows me, on the map, where to charge, cost / Kwh, and how long the charging stop will be. Tesla App on my phone does the same thing. I've heard that the goal is to have a charger every 50 miles along the major routes. More chargers continue to be installed every day.