U.S Department of Transportation
Metadata for Other Populated Areas (OPAs). These are considered High Consequence Areas (HCAs) as defined in 49 CFR § 195.450. The OPA data is derived from the U.S. Census Bureau’s TIGER Census-Designated Places (CDP)…
Updated Oct 25, 2026
U.S Department of Transportation
Metadata for Coastal Ecological Unusually Sensitive Areas (Coastal Eco USAs). These are high consequence areas, as defined in 49 CFR § 195.450 and 195.6 (b) (6)-(7), representing coastal beaches (any land between the…
Updated Oct 25, 2026
U.S Department of Transportation
Metadata for High Population Areas (HPAs). These are considered High Consequence Areas (HCAs) as defined in 49 CFR § 195.450. The HPA data is derived from the U.S. Census Bureau’s TIGER Urban Areas geospatial data layer…
Updated Oct 25, 2026