Implement KPI calculation

[wklumpen]

Description

Calculate performance metrics from simulation results.

Epic

🟢 API Foundation (Weeks 1-2)

Tasks

• Create calculate_metrics() method in Model
• Calculate average delay by corridor
• Calculate on-time percentage (e.g., within 2 minutes)
• Calculate headway statistics (mean, min, max, std)
• Calculate dwell time statistics by station
• Detect conflicts/near-misses (optional for MVP)
• Include metrics in Model.results dictionary

Acceptance Criteria

• Metrics calculated automatically after simulation completes
• All KPIs present in results
• Broken down by corridor/station where relevant
• Calculations are correct (validate against manual calculation)

Time Estimate

3 hours

Dependencies

• Depends on Refine structured logging to Model #95 (Structured logging provides input data)

Files Changed

• spur/model.py

Testing

Run simulation and manually verify metric calculations.