Data field · Event · Geographic area

Interstate highway indicator

The observed, reported, or decoded interstate highway indicator for the applicable subject, with source-specific role, unit, coding, and observation context retained in schema inventory.

Who carries it ↓

1Data sources

1Providers

1Free to access

Sources that carry it

1 source

National Highway Traffic Safety Admin…

NHTSA Crash Report Sampling System (CRSS) National Files

Annual public-use national probability-sample files for eligible police-reported motor-vehicle traffic crashes. Coordinated crash, vehicle, person, event-sequence, related-factor, weather, vPIC-derived, and auxiliary tables are pinned to the 2024 first final release dated 2026-04-01. CRSS is not a census or arbitrary-event lookup; estimates require its survey-design fields.

Free Full file National US 202 fields

Questions it helps answer

Traffic crash occurrence and sequence Traffic crash roadway and environmental conditions

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