Is a Sukkah-mobile valid?[1]
A Sukkah that is attached to the back of a pick-up truck is valid[2] so long as a normal wind cannot blow off the walls or the Sechach. Such a Sukkah is valid even when the car is moving[3] and even if it does not have a floor attached to it.[4]
[1] Piskeiy Teshuvos 628:2
[2] Admur 628:4 regarding a Sukkah built on a ship or wagon; 628:8 regarding a Sukkah built on camel.
[3] Admur 628:4; Shaar HaTziyon 628:11
[4] Piskeiy Teshuvos ibid