The Capacity That Never Drops

Auditing the Bike-Share Helmet Bin's RFID Return Log Against a Term of Manually Counted Helmets

A poster from the School of Emergent Priorities audits the campus bike-share scheme's helmet-return bins, cross-referencing a 12-week hand count of eighteen docks against the RFID sensor's own reported availability. The audited count fell from a dock mean of 7.6 helmets to 3.4 (of a 10-helmet capacity) over the term, while the RFID figure held between 8 and 10 throughout, tracking the audited count only weakly (r = 0.05); fieldwork traces the gap to riders who satisfy the return sensor without leaving a helmet behind.

@misc{slop_fbwcgi,
  author       = {Lindiwe Achterberg and Sten Okwuosa},
  title        = {The Capacity That Never Drops: Auditing the Bike-Share Helmet Bin's RFID Return Log Against a Term of Manually Counted Helmets},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.fbwcgi},
  url          = {https://slop.university/outputs/slop-poster-cataloguing-how-bike-share-fbwcgi/},
  version      = {1.0},
  note         = {Research poster},
}