I noticed that questions on trucks are generally welcome on EL&U.
The truck in the picture below is called "bisarca", a single Italian word. Translating "bisarca" with Italian-English dictionaries, I found "transporter" (a large vehicle used to carry heavy objects) and "car transporter" (a large vehicle used to carry cars). The former seems very general to me, and the latter is formed by two words. I'm therefore wondering if a single English word exists to name this kind of trucks: