You already know the split week runs on two calendars and one car. What you may not have counted is what the driving costs, because it never arrives as one bill. It shows up as tank fills, extra service visits, an hour you didn't have, and the quiet tiredness of being behind the wheel at 4:45 on a Thursday. The good news is that this line moves. Most of what pushes it up is something you can see on paper, even when you can't change the geography.
Local option: New Plan Care gives families in the St. Louis area in-home help so a parent can stay home: companionship, help with bathing and dressing, meals, and overnight care. Call (314) 405-0887.
Count the legs, not the miles
Take a blank week and list every leg: school drop-off, school pickup, the swing from your house to Mom's, the trip back for the forgotten folder, the run to practice, the ride home after a late shift. A leg is one trip from one place to another. Most families are surprised by the count. A handful of school days can turn into a long list of legs once the afternoon window and the activities are written down. Put that total at the top of the page. Everything else builds on it.
What makes each leg longer
Distance matters, but it is rarely the biggest factor. Check these first.
Whether the leg sits on the way to something else. A pickup that falls on your route to work costs almost nothing extra. The same pickup in the opposite direction costs a full trip out and back.
Whether both kids are in the same place. Two schools or two activity fields mean two stops where one would do.
How many times the car has to move between houses. Each handoff is a leg. Ask whether the kids can stay put for an afternoon instead of traveling the same road twice.
Traffic at the same hour every day. A short drive at midday can take much longer at school dismissal. Time the real trip at the real hour before you plan around it.
Who is driving. If the car always goes with the same parent, the wear and the schedule land on one person. A second driver or a second vehicle is a bigger change than most people expect, so compare it on paper before you decide.
What you can shrink
Start with the legs that exist only because nothing else is set up. Can an activity move to a site nearer one house? Can one adult cover a pickup while the other handles the evening? Can a non-medical helper take a short errand or a pickup leg, if your family's rules and the helper's written agreement allow it? Before the first ride, check who drives, whose car is used, and who carries insurance for that trip. Those answers belong on paper, not in a text thread.
Appointments with a doctor or a therapist stay on your list and get scheduled around the care team's times. If those visits keep colliding with the rest of the week, bring the collision to the care team rather than solving it with a rushed drive.
What to compare before you change anything
Pick one week and run it twice: once as it is, and once with one leg removed or one handoff moved. Count the legs, the minutes behind the wheel, and the moments when someone had to be somewhere in a hurry. If the second version saves a leg and doesn't create a missed pickup, you have a real change. If it saves a leg but opens a gap nobody covers, you have moved the cost, not cut it.
Keep a simple note of fill-ups and service visits for one month. The record gives you something concrete to bring to a planning talk with your partner or with a helper before anyone commits to a new setup.
Where to look next
If the drive is part of a bigger question about help for the afternoon window, Local Help in St. Louis lists where to start in west county. For the weekly rhythm this piece assumes, The Kids' Week and Mom's Week walks through the split week method itself.