Replication Materials for Vulnerable Road User Safety after Wales's Default 20 mph Reform: Implications for Sustainable Mobility

This record contains version 1.1 of the processed analytical data, analysis code, diagnostics, numerical outputs and public source files supporting the manuscript “Vulnerable Road User Safety after Wales’s Default 20 mph Reform: Implications for Sustainable Mobility”. The study examines changes in pedestrian, cyclist and child casualty outcomes following Wales’s default 20 mph reform, using English local authorities as the comparison group. Version 1.1 adds Poisson estimates for the six main outcomes, outcome-specific pre-trend tests, broader-period sensitivity analyses, exact aggregate-unit placebo inference and leave-one-local-authority-out diagnostics. The archive also includes school-travel analyses, current road-status comparisons and speed-monitoring results. No confidential or participant-identifiable records are included. Data provenance and applicable reuse terms are documented in DATA_SOURCES.md.