You do not need to inform him that you are fine driving home. It would be ok under normal circumstances of a married couple but it’s not needed under the circumstances going through divorce and him creating obstacles. I assume you are regularly driving around so it’s not like you never drove before or you drove sick baby to the hospital. You went out. Not a life altering event when he has to be in a loop. He’s trying to stay relevant and you keep being hooked. If it’s not about signing divorce paper, no need to read or respond to his texts