John Harris

Senior Staff Engineer at ALSO, Inc. Mapping lead · Valhalla core contributor

About

I lead mapping and routing infrastructure for ALSO, focusing on scaling Valhalla for bicycles, e-bikes, and micromobility networks. My work spans routing algorithm optimization, OSM data quality for active transportation, and real-world deployment at scale.

Current Focus

• Bicycle routing: Developing and refining costing models for balanced, quiet, and direct routes
• Valhalla: Contributing to the open-source routing engine, particularly around intersection handling and turn penalties for cycling
• Data quality: Ensuring OSM tags and attributes accurately represent infrastructure for active transportation

Expertise

• Routing algorithms and costing models
• OSM tag schema and data governance
• Graph-based transportation networks
• C++, MapBox, Protobuf

Connect

• Email: jharris@ridealso.com