Car/Driving:

Driving on Chol Hamoed: It is permitted to drive on Chol Hamoed whether it is for the need of the Moed, or simply for the sake of a trip or outing. [If, however, it is not for the need of the Moed, and is not for the sake of a trip or outing, then it is disputed amongst Poskim whether it is permitted to do so.]

May one fix a car on Chol Hamoed? It is permitted to fix a car on Chol Hamoed under certain conditions. 1) It is only permitted to do so for the sake of using the car for the sake of the Moed. 2) Likewise, it is only permitted to do so if the fixing is defined as Maaseh Hedyot, which means that it can be performed by any amateur and does not require a professional [such as to change a flat tire]. It is however forbidden to perform a fixing that is defined as Maaseh Uman, professional work, even if it is for the sake of the Moed, unless one of the listed exceptions of Maaseh Uman is applicable. One may not fix a car even with Maaseh Hedyot, for the sake of traveling from Eretz Yisrael to the Diaspora.  Thus, one may not fix a flat tire for the sake of traveling to Eilat.

May one take driving lessons on Chol Hamoed? Some Poskim rule it is permitted to do so long as one did not schedule the lessons purposely for Chol Hamoed. Other Poskim forbid doing so.