I noticed that questions on trucks are generally welcome on EL&U; yes, they are not for retired grammarians, but, maybe, some people could be interested in.
In the picture below we see a truck that in my language is called with the single word "bisarca". Translating "bisarca" with Italian-English dictionaries I found "transporter" (a large vehicle used to carry heavy objects) or "car transporter" (a large vehicle used to carry cars). But, to me, the former seems too general and the latter is formed by two words.
So, I'm wondering if a single English word exist to name this kind of trucks