Contents

Introduction
- Introduction
Crate layout
- Crate layout
Core data model
Scoring contract
- Scoring contract
Solver contract
- Solver contract
Point-of-interest storage
- Point-of-interest storage
Travel-time providers
- Travel-time providers
Test support utilities
- Test support utilities
Error handling summary
- Error handling summary
Typical integration flow
- Typical integration flow

Travel-time providers

Updated Jul 16, 2026

Travel-time lookups are pluggable via the TravelTimeProvider trait, which returns an n×n adjacency matrix (TravelTimeMatrix). Implementations must report TravelTimeError::EmptyInput when called with an empty slice.[^9] The library ships with UnitTravelTimeProvider behind the test-support feature to simplify integration testing.[^10]