Every parent knows the math of a long drive: somewhere around hour three, someone under four feet tall needs to run in a circle for fifteen minutes or the whole car pays for it. The problem is you can't see a playground from the interstate. So we mapped them.
That's 200,598 US playgrounds matched against every exit in the country. More than half the time, the swing set was right there.
I-95 is America's playground corridor with 640 exits, which tracks: it threads through more towns than any other road. Then I-5 (510), I-10 (493), I-90 (391), I-80 (371), and I-70 (363). Texas and California essentially tie for the state lead at about 1,200 exits each.
A reader asked the obvious inverse: where are the exits without one? The emptiest stretch in America is — who else — I-10 through West Texas: 210 miles between playground exits (milepost 155 to 365), the same void that holds most of the restaurant-chain gap records. The runners-up: I-10 across the Florida panhandle (153 miles), I-5 through California's Central Valley (151), and I-40 through the Mojave (139). Those are the four drives where you let the kids run laps around a gas pump and apologize.
The trick to the playground stop is pairing it: gas up, grab food, then ten minutes of swings before buckling back in — it converts a 15-minute stop into a reset that buys you two quiet hours. The dark stretches on the map (rural I-90, I-94, the Mountain West) are where you plan ahead, because the exits out there are 30 miles apart and most have nothing but a gas pump.
Update: as of this week, the playgrounds are in the app. Every playground on this map now shows up on its exit's page in Pit Stop, alongside the gas, food, and hotels — so the "is there a playground at this exit" question answers itself while you're driving.
A playground within a mile of the ramp is not always a playground you'd detour for — some are school playgrounds (often off-limits during school hours), some are a single sad spring horse. OpenStreetMap coverage also under-counts in rural areas, so the real number is, if anything, higher than 58%.