Plugshare has this cool feature where it tells you if a charger is a rapid charger or a destination charger. The orange ones in the image are rapid chargers. As you can see, they are not just on highways.

Plugshare also has a rating system to give you an indication of reliability, user reports so you can see if it was working recently, and even has integration with several charging companies to give you realtime information about how many chargers are available or in use.

The old tritium chargers had reliability issues, but the newer chargers seem to be a lot better so far.