openinterstate

Structured US interstate data from OpenStreetMap

Directional corridors, normalized exits, linked places, and reference routes — derived from raw OSM and published as dated, checksummed releases.

564
corridors
36,195
exits
101,363
places
250
reference routes

Get the data

curl -LO \
  https://github.com/tldev/openinterstate/releases/download/release-2026-03-11-standalone/openinterstate-release-2026-03-11-standalone.tar.gz

Or browse releases for manifests, checksums, and lineage files.

What's in a release

CSV tables, GPX reference routes, and GeoJSON examples.

Table Description
corridors Contiguous directional interstate corridors
corridor_edges Graph edges assigned to corridors
corridor_exits Normalized exits linked to a corridor
exit_aliases Source exit aliases mapped to normalized exits
places Reachable places and services
exit_place_links Relationships between exits and places
exit_place_scores Reachability and ranking metadata
reference_routes Routes for QA, examples, and exploration

Links