Keywords
Theme:
Network, Highways
Theme:
Highways, Network
Place:
USA, United States
Stratum:
ground
Temporal:
2006, 2007, 2008, 2009
Description
Abstract
The National Highway Planning Network is a comprehensive network database of the nation's major highway system. It consists of the nation's highways comprised of Rural Arterials, Urban Principal Arterials and all National Highway System routes. The data set covers the 48 contiguous States plus the District of Columbia, Alaska, Hawaii, and Puerto Rico. The nominal scale of the data set is 1:100,000 with a maximal positional error of ±80 meters.
Purpose
The primary purpose of this geospatial data set is to serve the FHWA needs in highway planning, policy analysis, visualization of the Highway Performance Monitoring System (HPMS) database and network modeling. The NHPN is the digital source used for coding and publishing the FHWA approved National Highway System maps.
Supplementary Information
The NHPN version 2005.08 contains 8 polyline features (RECIDs 4000057, 4000855, 41000287, 41002220, 48000952, 72001074, 72001170, and 72001488) that are each defined by more than 500 shape points. These features will not import correctly into the workstation version of ArcInfo, which has a 500 shapepoint limit. When importing into the workstation version of ArcInfo, the 8 features will be automatically split into 2 features each. As part of this process, attributes are simply duplicated on the split features. Because of this, attributes such as MILES and KM become invalid for these features.
_________________
Status of the data
In work
Data update frequency: Irregular
Data update frequency: Irregular
Time period for which the data is relevant
Date and time:
2009
Description:
publication date
Publication Information
Who created the data: FHWA
Date and time:
20050801
Publisher and place:
Federal Highway Administration (FHWA), Washington DC
_________________
Data storage and access information
File name: nhpnlin
Type of data: vector digital data
http://www.fhwa.dot.gov/
Data processing environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
Type of data: vector digital data
Location of the data:
Accessing the data
Data format: ESRI Shapefile
Size of the data: 60.450 MB
Data transfer size: 145.986 MB
How to decompress the file: No compression applied. However, if using digital transfer online option, note access instructions.
Size of the data: 60.450 MB
Data transfer size: 145.986 MB
How to decompress the file: No compression applied. However, if using digital transfer online option, note access instructions.
Access instructions: NTAD is available for download at www.bts.gov/programs/geographic_information_services. The NTAD DVD can also be ordered from the online bookstore at www.bts.gov.
Available media: DVDConstraints on accessing and using the data
Access constraints:
None
Use constraints:
The NHPN Version 2005.08 database, or any portion thereof, can be freely distributed as long as this metadata entry is included with each distribution. The original metadata entry cannot be modified or deleted from any data transfer.
Details about this document
Contents last updated: 20090403
at time 12414700
Who completed this document
Geospatial Information Program
Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
mailing address:
202-366-DATA (voice)
answers@bts.gov
Research and Innovative Technology Administration's Bureau of Transportation Statistics (RITA/BTS)
mailing address:
1200 New Jersey Ave., SW
Washington, DC 20590
USA
202-366-DATA (voice)
answers@bts.gov
Standards used to create this document
Standard name: FGDC Content Standards for Digital Geospatial Metadata
Standard version: FGDC-STD-001-1998
Time convention used in this document: local time
Metadata profiles defining additonal information
ESRI Metadata Profile: http://www.esri.com/metadata/esriprof80.html
Standard version: FGDC-STD-001-1998
Time convention used in this document: local time
Metadata profiles defining additonal information
Horizontal coordinate system
Geographic coordinate system name: GCS_WGS_1984
Details
Geographic Coordinate System
Latitude Resolution: 0.000001
Longitude Resolution: 0.000001
Geographic Coordinate Units: Decimal degrees
Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
Altitude System Definition
Resolution: 0.001000
Encoding Method: Explicit elevation coordinate included with horizontal coordinates
_________________
Bounding coordinates
Horizontal
In decimal degrees
West:
-176.763993
East:
-65.593643
North:
71.316994
South:
17.934389
In projected or local coordinates
Left: -176.763993
Right: -65.593643
Top: 71.316994
Bottom: 17.934389
_________________
Lineage
FGDC lineage
Process step 1
Process description: Conflation of NHPN V1 to DLG-3 road alignments using R-MATCH software developed by the Geographic Information Systems Group, University of Tennessee.
Source used: NHPN V1
Source used: DLG-3
Process date: 19930701
Source used: NHPN V1
Source used: DLG-3
Process date: 19930701
Process step 2
Process description: Digitizing and converting of state-supplied digital and map data. Line work geodetically controlled to match DLG-3 line work.
Source used: State Data
Source used: DLG-3
Process date: 19931231
Source used: State Data
Source used: DLG-3
Process date: 19931231
Process step 3
Process description: Integration of conflated version of NHPN V1 and assimilated state data into a comprehensive topologically integrated network database. States edge matched and NHS attributes verified.
Process date: 19940915
Process date: 19940915
Process step 4
Process description: Integration of supplemental state data into the NHPN V2. NHS attributes verified.
Process date: 19970115
Process date: 19970115
Process step 5
Process description: Integration of intermodal connector links into the NHPN V2. States edge matched and NHS attributes verified.
Process date: 19980101
Process date: 19980101
Process step 6
Process description: Attachment of a Linear Referencing System to the NHPN V2. State Data used for LRS attribute information.
Process date: 19991001
Process date: 19991001
Process step 7
Process description: Integration of Ramp Group Cordon Boundary nodes into the NHPN for future addition of ramp group features. States edge matched, NHS attributes verified, and national LRSKEY added to facilitate a national route system.
Process date: 19991001
Process date: 19991001
Process step 8
Process description: Further integration of Ramp Group Cordon Boundary nodes into the NHPN for future addition of ramp group features. States edge matched, NHS attributes verified.
Process date: 20000225
Process date: 20000225
Process step 9
Process description: Update of Linear Referencing System to the NHPN V4.0. State data used for LRS attribute information.
Process date: 20010601
Process date: 20010601
Process step 10
Process description: Update and rebuild Linear Referencing System to the NHPN V 2002.10. State data used for LRS attribute information.
Process date: 20020730
Process date: 20020730
Process step 11
Process description: Update LRS directionality and calibrate LRS milepost attribute value to match state supplied HPMS to the NHPN V 2002.10 route system. State and FHWA HPMS-2001 data used for LRS attribute information.
Process date: 20020730
Process date: 20020730
Process step 12
Process description: Update NHS and intermodal connector links. States edge matched and NHS attributes verified.
Process date: 20020730
Process date: 20020730
Process step 13
Process description: Update and integrate intermodal terminals. States geo-location matched and attributes verified.
Process date: 20020730
Process date: 20020730
Process step 14
Process description: Conflation of NHPN V.4 RAT data to NHPN V 2002.10 arc and calibrate arc milepost LRS anchor information using R-TAG Interface developed by the Transport Modeling and GIS-T Applications Group, Transportation & Space division, Battelle, Columbus, Ohio.
Process date: 20020730
Process date: 20020730
Process step 15
Process description: NHPN V.4 Route System's directionality, Route Attribute Table and milepost anchor values verified with state-submitted HPMS data elements. Anomalies are corrected or modified onto the NHPN V 2002.10 route system.
Process date: 20020730
Process date: 20020730
Process step 16
Process description: Coverage to geodatabase conversion.
Source used: NHPN 2002.10
Source produced: NHPN Geo 2003
Process date: 20030601
Source used: NHPN 2002.10
Source produced: NHPN Geo 2003
Process date: 20030601
Process step 17
Process description: Conversion of Spatial co-ordinate system from NAD 27 to NAD 83.
Source used: NHPN Geo 2003
Process date: 20030601
Source used: NHPN Geo 2003
Process date: 20030601
Process step 18
Process description: Assigned road name attributes for arcs where SIGN values are not available.
Source used: State Data 2003
Source used: CENSUS/TIGER/Line 2000
Process date: 20030701
Source used: State Data 2003
Source used: CENSUS/TIGER/Line 2000
Process date: 20030701
Process step 19
Process description: Corrected topological errors using ArcGIS 8.3 geodatabase topology rules.
Source used: NHPN Geo 2003
Process date: 20030801
Source used: NHPN Geo 2003
Process date: 20030801
Process step 20
Process description: Transferred route information from the NHPN route to the NHPN arc features
Source used: NHPN Geo 2003
Process date: 20031001
Source used: NHPN Geo 2003
Process date: 20031001
Process step 21
Process description: Revised and modified arc feature's topology direction with state submitted route feature and/or HPMS route direction.
Source used: State Data 2003
Source used: State Data 2002
Source used: HPMS 2002
Process date: 20031101
Source used: State Data 2003
Source used: State Data 2002
Source used: HPMS 2002
Process date: 20031101
Process step 22
Process description: Verified arcs direction with state submitted GIS data and HPMS.
Source used: State Data 2003
Source used: State Data 2002
Source used: HPMS 2002
Process date: 20031201
Source used: State Data 2003
Source used: State Data 2002
Source used: HPMS 2002
Process date: 20031201
Process step 23
Process description: Created new NHPN route system from the NHPN arc's embedded route information with the aid of computer algorithm developed under ArcGIS environment.
Source used: NHPN Geo 2003
Process date: 20040101
Source used: NHPN Geo 2003
Process date: 20040101
Process step 24
Process description: Updated CENSUS small urban area code and HPMS urbanized area code to the arc and node features.
Source used: Urban Area 2003
Process date: 20040201
Source used: Urban Area 2003
Process date: 20040201
Process step 25
Process description: Modified NHS codes as per direction of the FHWA. NHS codes 2,5, and 6 as reported in the previous versions of NHPN were changed to 7,3, and 4 respectively.
Source used: NHPN Geo 2003
Process date: 20040301
Source used: NHPN Geo 2003
Process date: 20040301
Process step 26
Process description: Changed STRAHNET codes 1, 2, and 3 to 6, 1 and 2 respectively. Replaced definition of codes 3, 4 and 5 as Rural Non-Designated Interstate, Urban Designated Interstate and Urban Non-Designated Interstate respectively.
Source used: NHPN 2004.10
Process date: 20050615
Source used: NHPN 2004.10
Process date: 20050615
Process step 27
Process description: Added STRAHNET connectors and corresponding to FAC_ID and CONN_DES.
Source used: STRAHNET Connectors
Process date: 20050701
Source used: STRAHNET Connectors
Process date: 20050701
Process step 28
Process description: Verified Intermodal terminals.
Process date: 20050715
Process date: 20050715
Process step 29
Process description: Modified NHS based on ammendments
Process date: 20050615
Process date: 20050615
Process step 30
Process description: Added status code as per direction of the FHWA. Status code 2 was added to identify ferry routes.
Process date: 20050701
Process date: 20050701
Process step 31
Process description: Identified and assigned status code 2 to the ferry routes.
Source used: NHPN 2004.10
Process date: 20050701
Source used: NHPN 2004.10
Process date: 20050701
Sources
Source 1:
National Highway Planning Network V1.1
(NHPN V1)
Contribution: Non-verified attributes for rural highways.
Currentness of this source
Date and time:
19920701
Source 2:
USGS Digital Line Graph (DLG-3) Series
(DLG-3)
Contribution: Road alignments for rural and urban highways.
Currentness of this source
Date and time:
1978
Source 3:
State-supplied digital and map data
(State Data)
Contribution: Alignments and attributes for urban highways. Sign route and function class attributes for principal arterial system.
Currentness of this source
Date and time:
19921231
Source 4:
State-supplied digital and map data
(State Data)
Contribution: Alignments, sign route NHS classification for National Highway System.
Currentness of this source
Date and time:
19931101
Source 5:
State-supplied digital and map data
(State Data)
Contribution: Linear Referencing System Attributes
Currentness of this source
Date and time:
19931101
Source 6:
CENSUS TIGER/Line 1994
(TIGER)
Contribution: Alignment, shape and location of ramp features
Currentness of this source
Date and time:
1994
Source 7:
CENSUS TIGER/Line 2000
(TIGER)
Contribution: Alignment, shape and location of intermodal connectors and terminals
Currentness of this source
Date and time:
2000
Source 8:
State-supplied digital and map data
(State Data)
Contribution: Alignment, shape and location of intermodal connectors and terminals
Currentness of this source
Date and time:
2002
Source 9:
Geographic Information System (GIS) Data and paper maps
(State Data 2003)
Contribution: Fixed LRS route direction to match HPMS mileage direction.
Calibrate LRS milepost attribute value to match state supplied HPMS.
Create/modify of new LRS Routes to match state supplied HPMS.
Assign a road name attribute for arcs where SIGN values are not available.
Currentness of this source
Date and time:
2005
Source 10:
National Highway Planning Network V2002.10
(NHPN 2002.10)
Contribution: Upgrade NHPN format to Geodatabase.
Currentness of this source
Date and time:
20021001
Source 11:
Highway Performance Monitoring System
(HPMS 2002)
Contribution: Calibration of LRS milepost attribute value.
Creation of new LRS Routes.
Currentness of this source
Date and time:
2003
Source 12:
Urban Area
(Urban Area 2003)
Contribution: Assign CENSUS Small Urban Area code.
Assign HPMS Urbanized Area code.
Assign Rural/Urban Code.
Currentness of this source
Date and time:
2003
Source 13:
National Highway Planning Network V2002.10 Geodatabase format
(NHPN Geo 2003)
Contribution: Provided a platform for topological Q/C analysis.
Currentness of this source
Date and time:
2003
Source 14:
STRAHNET Connectors
(STRAHNET connectors)
Contribution: Delineated STRAHNET Priority 1 and Priority 2 connectors.
Currentness of this source
Date and time:
2005
Source 15:
FHWA Intermodal Facility and Connectors
(FHWA Intermodal Facility and Connectors)
Contribution: Updated FAC_ID, CONN_ID, CONN_DES and CONN_MILES.
All the updates were made on this version of the NHPN
Currentness of this source
Date and time:
2005
_________________
Spatial data quality
Horizontal positional accuracy
The original elements of the NHPN have been conflated to the 1:100,000 DLG-3 data set, which maintains a nominal accuracy of at least ±80 meters. Where new roads have been added which are not in the DLG-3 database, link alignments have been digitized or converted from digital sources acquired from state DOTs with a map scale of at least 1:100,000. Where State data source was not available, CENSUS TIGER/Line 2000 was used.
_________________
Spatial data description
Vector data information
ESRI description
nhpnlin
ESRI feature type: Simple
Geometry type: Polyline
Topology: FALSE
Feature count: 176191
Spatial Index: TRUE
Linear referencing: FALSE
Geometry type: Polyline
Topology: FALSE
Feature count: 176191
Spatial Index: TRUE
Linear referencing: FALSE
SDTS description
nhpnlin:
String, 176191
Feature class:
Network chain, nonplanar graph, 176124
Feature class:
Node, network, 138902
Feature class: SDTS feature type, feature count
Details for nhpnlin
Type of object: Feature Class
Number of records: 176191
Description
National Highway Planning Network
Source: FHWA & RITA/BTS
Source: FHWA & RITA/BTS
Attributes
FID
Definition:
Internal feature number.Definition Source:
ESRI
Shape
Definition:
Feature geometry.Definition Source:
ESRI
RECTYPE
Data type: String
Width: 1
Definition:
Width: 1
Definition:
Identifies arc file records.Definition Source:
FHWA
VERSION
Data type: String
Width: 7
Definition:
Width: 7
Definition:
Used for maintaining consistency across data files containing alternate releases of the NHPN. The Version Code consists of a leading Version Number (the year of release) and a trailing number (the month of release), thus, 2004.06 describes Major Release for the year 2004 and month 06.Definition Source:
FHWA
RECID
Data type: Number
Width: 19
Definition:
Width: 19
Definition:
A unique numeric ID associated with each arc of NHPN version 2004.06.Definition Source:
FHWA
ORIGID
Data type: Number
Width: 19
Definition:
Width: 19
Definition:
A unique numeric ID associated with each arc of previous versions of NHPN as appropriate.Definition Source:
FHWA
FNRECID
Data type: Number
Width: 19
Definition:
Width: 19
Definition:
Identifies a node in the nhpnnod shapefile that corresponds to the starting position of the arc chain.Definition Source:
FHWA
TNRECID
Data type: Number
Width: 19
Definition:
Width: 19
Definition:
Identifies a node in the nhpnnod shapefile that corresponds to the ending position of the arc chain.Definition Source:
FHWA
CTFIPS
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
3 digit FIPS code for the county the arc resides.Definition Source:
Federal Information Processing Standards
SOURCE
Data type: String
Width: 1
Definition:
Width: 1
Definition:
Source of arcDefinition Source:
FHWA
LGURB
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
3 digit HPMS Urbanized Area code for the Urbanized Area in which the arc lies. A value of 0 indicates the arc is outside any HPMS Urbanized Areas.Definition Source:
Highway Performance Monitoring System 2001
SMURB
Data type: Number
Width: 9
Definition:
Width: 9
Definition:
5 digit CENSUS Small Urban Area code for cities under 50,000 population in 2000. A value of 0 indicates the arc is outside any Small Urban Area.Definition Source:
CENSUS 2000
SIGN1
Data type: String
Width: 7
Definition:
Width: 7
Definition:
Contains the designated primary Sign Route for the arc.Definition Source:
FHWA
SIGNT1
Data type: String
Width: 1
Definition:
Width: 1
Definition:
Describes the type of the sign route.Definition Source:
FHWA
SIGNN1
Data type: String
Width: 5
Definition:
Width: 5
Definition:
Contains the actual sign route numbers . Using HPMS standards, an optional directional indicator (N, S, E, W) can also be used as part of this field.Definition Source:
FHWA
SIGNQ1
Data type: String
Width: 1
Definition:
Width: 1
Definition:
Sign Route Qualifier Record which is used to qualify the sign route description follows the Sign Route Number.Definition Source:
FHWA
SIGN2
Data type: String
Width: 7
Definition:
Width: 7
Definition:
Contains the designated secondary Sign Route for the arc.Definition Source:
FHWA
SIGNT2
Data type: String
Width: 1
Definition:
Width: 1
Definition:
Describes the type of the sign route.Definition Source:
FHWA
SIGNN2
Data type: String
Width: 5
Definition:
Width: 5
Definition:
Contains the actual sign route numbers . Using HPMS standards, an optional directional indicator (N, S, E, W) can also be used as part of this field.Definition Source:
FHWA
SIGNQ2
Data type: String
Width: 1
Definition:
Width: 1
Definition:
Sign Route Qualifier Record which is used to qualify the sign route description follows the Sign Route Number.Definition Source:
FHWA
SIGN3
Data type: String
Width: 7
Definition:
Width: 7
Definition:
Contains the designated additional secondary Sign Route for the arc.Definition Source:
FHWA
SIGNT3
Data type: String
Width: 1
Definition:
Width: 1
Definition:
Describes the type of the sign route.Definition Source:
FHWA
SIGNN3
Data type: String
Width: 5
Definition:
Width: 5
Definition:
Contains the actual sign route numbers . Using HPMS standards, an optional directional indicator (N, S, E, W) can also be used as part of this field.Definition Source:
FHWA
SIGNQ3
Data type: String
Width: 1
Definition:
Width: 1
Definition:
Sign Route Qualifier Record which is used to qualify the sign route description follows the Sign Route Number.Definition Source:
FHWA
LNAME
Data type: String
Width: 30
Definition:
Width: 30
Definition:
Contains the local street name for the arc.Definition Source:
FHWA
MILES
Data type: Number
Width: 19
Number of decimals: 6
Definition:
Width: 19
Number of decimals: 6
Definition:
Contains measurement in miles for the arc chain.Definition Source:
FHWA
KM
Data type: Number
Width: 19
Number of decimals: 6
Definition:
Width: 19
Number of decimals: 6
Definition:
Contains measurement in kilometers for the arc chain.Definition Source:
FHWA
FCLASS
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
Identifies the assigned functional class of each arc.Definition Source:
Original functional classification codes came from data sources submitted as part of 1992 Functional Reclassification by State agencies. For segments on the National Highway System this attribute has been quality controlled against the 2002 HPMS.
RUCODE
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
Describes the Rural/Urban classification of the arc.Definition Source:
FHWA
STATUS
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
Describes availability of the arc to through traffic.Definition Source:
FHWA
NHS
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
Special subnetwork for the National Highway System. The following values were converted per direction from the FHWA: 2 (ISTEA High Priority Corridor) was converted to 7 (Other NHS) , 5 (ISTEA High Priority Corridor/ Non-Interstate STRAHNET) was converted to 3 (Non-Interstate STRAHNET), 6 (ISTEA High Priority Corridor/STRAHNET Connector) was converted to 4 (STRAHNET Connector).Definition Source:
FHWA
STRAHNET
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
Special subnetwork for the Strategic Highway Corridor Network.Definition Source:
FHWA
FAC_ID
Data type: String
Width: 10
Definition:
Width: 10
Definition:
FHWA designated Intermodal Facility unique ID.Definition Source:
Federal Highway Administration
CONN_ID
Data type: String
Width: 10
Definition:
Width: 10
Definition:
FHWA designated Intermodal Facility Connector unique IDDefinition Source:
Federal Highway Administration
CONN_DES
Data type: String
Width: 200
Definition:
Width: 200
Definition:
Description of Intermodal Facility ConnectorsDefinition Source:
Federal Highway Administration
CONN_MILES
Data type: Number
Width: 19
Number of decimals: 3
Definition:
Width: 19
Number of decimals: 3
Definition:
Total Mileage of the designated Connector.Definition Source:
Federal Highway Administration
LRSKEY
Data type: String
Width: 15
Definition:
Width: 15
Definition:
Uniquely identifies a route within a state.Definition Source:
Highway Performance Monitoring System
LRSSEQ
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
NHPN arc mile point sequence number.Definition Source:
FHWA
BEGMP
Data type: Number
Width: 19
Number of decimals: 3
Definition:
Width: 19
Number of decimals: 3
Definition:
Beginning mile point for the NHPN arc segment.Definition Source:
FHWA
ENDMP
Data type: Number
Width: 19
Number of decimals: 3
Definition:
Width: 19
Number of decimals: 3
Definition:
Ending mile point of the NHPN arc segment.Definition Source:
FHWA
AADT
Data type: Number
Width: 9
Definition:
Width: 9
Definition:
The Annual Average Daily Traffic field comes from the 2002 Highway Performance Monitoring System.Definition Source:
FHWA
THRULANES
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
The Number of through lanes field indicates the number of striped lanes in both directions. This field does not include auxiliary lanes, such as collector-distributor lanes, weaving lanes, frontage road lanes, parking and turning lanes, acceleration/deceleration lanes, toll collection lanes and truck climbing lanes.Definition Source:
FHWA: HPMS
OWNERSHIP
Data type: Number
Width: 4
Definition:
Width: 4
Definition:
Identifies the road ownerDefinition Source:
FHWA: HPMS
STFIPS
Data type: String
Width: 2
Definition:
Width: 2
Definition:
State FIPS CodeDefinition Source:
FHWA
BTSVERSION
Data type: String
Width: 2
Definition:
Width: 2
Definition:
Version of the databaseDefinition Source:
RITA/BTS