"But Hecate would you ask your dh whether it was ok to walk your children to school or if you should drive, or would he assume you were an adult and could make that decision?"
No. Not at all. I must have missed where the OP said he expected his wife to ask him whether it was ok.
I would discuss it with him, if he wanted to discuss it and more than happily tell him why I was choosing to walk/drive and happily listen to his pov.
And you know what, if I didn't much care which I did, but one really really mattered to him - I'd probably do it.
If I felt just as strongly as he did, and neither of us could convince the other, then I'd say, you know what? I hear what you are saying, but I disagree. If I'm taking them, I'll do X. If you don't like that, feel free to take them and do Y.
What I wouldn't do is not exchange opinions, not listen to his pov, not discuss our reasoning or have a my way or the highway attitude.