Transparency

Data sources

  • OpenStreetMap / Overpass API

    Map geometry and live barrier signals — bike lanes, crosswalks, transit gaps.

  • Census ACS-style context

    Vehicle availability and youth share data to weight equity and access scores.

  • EPA EJScreen-style context

    Traffic proximity and heat exposure percentiles for safety friction and equity.

  • Local JSON / GeoJSON

    All barrier locations, scores, evidence, and fixes — fully offline, no API key needed.

Integrity guarantee

  • No private or personally identifiable data collected or stored
  • AI never produces or modifies numeric values
  • All scores are deterministic — reproducible from the same inputs
  • Bay Area high-school index from CDE 2024–25, generated offline