I have the same type of situation. My kids are 14, 13 & 11. I moved to the same area so the bus will come to my house when they are with me and the bus to/from their dad's house. Our schedule is sunday night at 6pm he dropps them off at my house and they are with me for the entire week. Then sunday at 6pm I drop them off and they are with their dad's for the entire week. The bus company is aware of this schedule and so is the school. We have straight 50/50 placement & custody.
You need to submit to your X a propsal in writing to see first if she would be willing to make any changes to your current situation. If she does, get it notarzied and file it in family court. If she doesn't accept it, then you need to take her to court. you do not need an attorney if you can research on your own.
I find it's so much easier on the kids and it's less contact between you and the X.


