Clearly this is not somehomehob Katyusha rocket, but a huge vehicle transported weapon.
Another amazing demonstration of the weakness of the Lebanese government.
Hezbollah can drive these rocket transporter/erectors around without interference from the Lebanese military.
That rocket image makes it look as if the missile is mounted to a regular flat bed truck bed. If that is the case, they could disguise the entire missile inside the back of a full size cargo trailer. Fake sides and tops that fall off or fold up. Impossible to tell from a normal mack truck with full cargo trailer.