Sposedly that song talks about a notorious road down into a deep valley where there is a bar
“Elsewhere, there is a more literal explanation that has been documented. “Highway to Hell” is the nickname of the Canning Highway in Australia, which runs through Fremantle (where Bon Scott lived) and ends at a bar called The Raffles. As the highway comes to an end, it turns into a steep decline.
Because of this, many drivers have been killed driving fast over that intersection after a night out. So when Scott sings about being on the “Highway to Hell,” it means he is making the trek down to The Raffles, hoping not to end up as one of the many who never reach their destination”
https://americansongwriter.com/behind-the-meaning-of-highway-to-hell-by-ac-dc/
Thanks! I like hearing about the inspiration for songs.