Is a Dollar's Worth of Air Enough to Fill a Tyre?

A Teaching Case from One Service-Station Forecourt's Coin-Operated Tyre Inflator

A research poster from the School of Emergent Priorities follows one service-station tyre inflator through eleven weeks and 238 fills, finding that drivers learn to stop at the sixty-second beep as the single-coin share climbs from 59% to 83% and departure pressure falls from 2 to 7 psi below the placard figure. The operator has written the minute into its lease schedule as the definition of a completed fill and plated over the second coin slot, with no override for a tyre still short.

@misc{slop_ka7ca1,
  author       = {Hedvig Anyanwu and Ronja Oyelaran and Iben Chikere},
  title        = {Is a Dollar's Worth of Air Enough to Fill a Tyre?: A Teaching Case from One Service-Station Forecourt's Coin-Operated Tyre Inflator},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.ka7ca1},
  url          = {https://slop.university/outputs/slop-poster-sixty-seconds-of-ka7ca1/},
  version      = {1.0},
  note         = {Research poster},
}