Data API

National Highway Freight Network

Freight & Aviation
Data Steward
DVRPC GIS
Update Frequency
as needed
Metadata Last Modified
March 27, 2025
Dataset Type
Geospatial
Source
United States Department of Transportation (USDOT)
Use Limitations
Unrestricted: can be shared internally and externally without data sharing agreement
License
No License Provided

The National Highway Freight Network is composed of the Primary Highway Freight System (PHFS), other Interstate portions, Critical Rural Freight Corridors (CRFCs), and Critical Urban Freight Corridors (CUFCs). The PHFS was set by the FAST Act. CRFCs and CUFCs have yet to be designated.

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Data Dictionary

Column Type Label Description
objectid OID OBJECTID Internal feature number.
shape Geometry Shape Feature geometry.
Unique link Identifier Integer ID
length Double LENGTH
dir SmallInteger DIR
NHFN Type String NHFN PHFS indicates segment part of the PHFS network; NON_PHFS_IS indicates segement is Interstate that is not part of PHFS
id1 Integer ID1
HPMS data year Integer YEAR
State FIPS Code SmallInteger STFIPS
County FIPS Code SmallInteger CTFIPS
HPMS Functional System SmallInteger F_SYSTEM See HPMS data document
HPMS road facility type SmallInteger FACILITY_T See HPMS data document
HPMS Urban Code Integer URBAN_CODE See HPMS data document
Route Sign Number String SIGN1
Route Designation (I, U or S) String SIGNT1 I=Interstate; U= US Route; S = State Route
Route number String SIGNN1
Route Type String SIGNQ1
alternate road name when SIGN1 is missing String LNAME
Geometric mileage Double MILES
Kilometer: converted from mile Double KM
Open or Closed SmallInteger STATUS 0=closed; 1=Open
National Highway System SmallInteger NHS 1= Interstate; 3, 5,4 and 6= STRAHNET; 7=other interstate; 8=intermodal connector
Strategic Highway Network SmallInteger STRAHNET
Intermodal ID serving by a set of intermodal connectors String FAC_ID
Intermodal Unique Connector Identification String CONN_ID
Connector Description String CONN_DES
Connector mileage Double CONN_MILES
HPMS 2012 Traffic Volume Integer AADT
HPMS 2012 Truck Traffic Volume Integer AADTT
HPMS 2012 combination Truck Volume Integer AADT_COMB
HPMS 2012 Single Unit Truck Volume Integer AADT_SINGL
2012 HPMS Through Lanes Integer THROU_LANE Number of Through Lanes as Reported in 2012 HPMS
Route LRS Identification String ROUTE_ID
Route sequence number Integer RT_SEQ Estimated route sequence number for a given segment
Beginning milepost Double BEGMP Beginning milepost of a given segment
Ending milepost Double ENDMP Ending milepost to a given segment
st_length(shape) Double st_length(shape)