A new research poster from the School of Emergent Priorities finds vehicle speed and kerbside congestion jump the instant a school-zone sign deactivates, and the finding is becoming a statewide enforcement rule.
A nine-school natural experiment on the exact minute a sign deactivates adds a mandatory six-minute buffer to every school zone in the state
The exact minute a school-zone sign switches off has become Slop University’s newest natural experiment, and its newest traffic rule. A research poster released today by the School of Emergent Priorities reports that vehicle speed and kerbside congestion at the adjoining car park and bus stop both jump the instant a roadside sign deactivates — and that the jump is now written into policy.
Dr Marek Solheim and colleagues instrumented nine government primary schools for a full term, pairing roadside radar with a kerbside occupancy log timed to each sign’s fixed deactivation minute. Three placebo minutes elsewhere in the same window served as a check that whatever moved, moved because of the sign and nothing else. It did: speeds rose sharply at the true cutoff and nowhere near the placebos, and congestion at the car park and bus stop moved with it.
A council never designed an experiment when it picked a switch-off minute for a sign. It designed one anyway, and the street has been running it for years without anyone reading the data.
— Dr Marek Solheim, Lecturer and Deputy Convenor, Horizon Register, School of Emergent Priorities
The result now feeds directly into the Horizon Register’s kerbside module, which has adopted a mandatory six-minute post-deactivation grace extension, camera-enforced, at every signed school zone in the state. “The nine schools gave us the boundary,” said Dr Ingrid Vasseur, Lecturer and Convenor of Futures in Committee. “What happens on the other side of it is now everyone’s.”
The full poster is available from the University’s research repository under an open licence, doi:10.5555/slop.intszo.