U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
The NextGen NHTS origin-destination (OD) analysis is based on 583 geographical zones established for the United States. These 583 zones include 446 Metropolitan Statistical Area (MSA) and Micropolitan Statistical Area (MiSA) based zones and 137 new zones created from reminders of States. This 583-zone structure is called version 1 zones. The above 583 zones are used in 2019, 2020, 2021, and 2022 OD data.
Since the initial development of the 583 zones, the FHWA has been continuously improving the zonal structure with a focus on geographic continuity and the alignment of the zones with the National Highway System. As a result of the enhancement process, 592 zones have been created (based on version 1 zones). The new 592 zone structure is defined as version 2 zones. The vast majority of the version 2 zones are the same as version 1. However, the version 2 zones do include nine new zones. In addition, 19 zones experienced their geographical area sizes decrease, and 20 zones had their geographical sizes increased compared to the version 1 zones.
Version 1 Assigned Zone by County/Equivalent
Caliper Maptitude format dataset
Version 1 OD Zone
Caliper Maptitude format dataset
Version 2 Assigned Zone by County/Equivalent
Caliper TransCAD format dataset
Version 2 OD Zone
Caliper TransCAD format dataset
