Corridor baseline atlas

Problem

Every anomaly method needs a baseline, and most are built ad hoc and thrown away. Without a shared, versioned reference for “ordinary” traffic, no two anomaly scores are comparable.

Approach

The atlas builds and versions a transit baseline per chokepoint — who passes, how fast, how often they report — so detectors score against a common reference rather than a private one.

• Aggregate cleaned tracks into per-corridor rhythms.
• Version each baseline so results are reproducible over time.
• Expose the baselines as the reference layer for the detector.

Outcome

A reusable reference layer that makes anomaly scores comparable across analysts and across seasons.