Eight Cars Back from the Gate

A Pre-Registered Replication of the Amber-Line Abandonment Discontinuity at a Primary-School Drop-Off Lane

A research poster from the School of Continuous Improvement pre-registers a replication of the eight-person amber cutoff at a primary-school drop-off lane's queue lamp, finding abandonment 0.9 points higher at the colour change (95% CI -3.8 to 5.6) against 12.4 originally, with wait time continuous across the cutoff and abandonment tracking minutes to the bell instead. The Office of Research Outputs strikes the lane from the Register of Metered Service Points and accepts replication evidence only from sites already registered.

@misc{slop_0hbqxh,
  author       = {Eivind Onwuka and Dagny Okafor and Joost Nwosu},
  title        = {Eight Cars Back from the Gate: A Pre-Registered Replication of the Amber-Line Abandonment Discontinuity at a Primary-School Drop-Off Lane},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.0hbqxh},
  url          = {https://slop.university/outputs/slop-poster-the-office-of-0hbqxh/},
  version      = {1.0},
  note         = {Research poster},
}