Gravel?

[Slowcountry Balls]

You can NOT breed het Highway(Gravel) to het Highway(Gravel) and get a Highway.

Gravel x Gravel gives you a Super Gravel
Gravel x Yellow Belly gives you a Highway.

Super Gravels and Highways look completely different.

If you read OhhWatALoser's quote a little more carefully, you'll notice that he was saying that a Highway is the only real het Highway, since if you breed a Highway to a Highway you'll get more Highways (along with Ivories and Super Gravels). OhhWatALoser then continues on to say it will just be easier to call the Gravel a Gravel and a Highway a Highway and not use the term het Highway, like what has been done with the Spark and Specter genes.