I think this is one area where I really feel differently than most on this board. When my ex and I split up, I stayed in the town, (matter of fact, still live in the same town), and he chose to move out of this town to one about 25 minutes away. I was already playing full time taxi service, getting him back and forth to daycare and other activities. I refused to do any extra driving, stating that so long as he decided to move to another town, he could do the driving. I did offer him a complete 50/50 deal, no CS, and split costs if he would move back to town where we were located. He wasn't interested in 50/50, as he wanted to stay near the girl he was dating.
It's ten years later, he is remarried and they have a place that is an hour away. I still refuse to do any additional driving. And my same offer stands.
His father and I get along quite well. He understands that he was the one that made the choice to move away.