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https://www.arcgis.com/sharing/rest/content/items/55ffeceadf72467bbe1ebcb4f03d52a0/info/thumbnail/thumbnail1768835976252.png
InterchangePolygons_v2_Merged
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GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_StatePlane_North_Carolina_FIPS_3200_Feet
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ISO 19139 Metadata Implementation Specification
<div style='text-align:Left;'><div><div><p style='margin:0;'><span>The NC Traffic Safety Interchange Inventory dataset is a statewide polygon GIS data layer where each polygon represents the area containing the interchange facility. For this dataset, interchanges were defined as a grade-separated junction of two or more roads where at least one road is fully access controlled and movements between roads are accomplished through straight and loop ramps. The polygon for each interchange encompasses the broad area of roadway where traffic interactions are reasonably related to the interchange, including all ramps, ramp intersections with cross streets, merging and diverging areas, acceleration and deceleration lanes, and portions of the mainline freeway that are within the general boundaries of the interchange. Each interchange was classified into a general design category, such as diamond or partial cloverleaf.</span></p><p style='margin:0;'> </p><p style='margin:0;'><span>This interchange inventory includes all interchanges in North Carolina, regardless of road ownership. This interchange inventory was developed to be used primarily in Traffic Safety analysis, though other users within NCDOT as well as external users may find this dataset useful. However, all users should be aware that this dataset was constructed to be suitable for the goals of planning level crash analysis and safety screening. As such, the level of detail and accuracy may not be appropriate for more detailed analysis. For example, the borders of each interchange polygon were drawn in a manner that would ensure that a safety analysis would identify geolocated crashes within the boundary that may be related to the interchange. Further detailed safety analysis and examination of crash reports would follow this high-level identification. To allow for inaccuracies in crash geolocation or data errors, the boundaries of the interchange polygons typically encompass an area much wider than the actual paved roadway. Since the boundaries are only intended to be used in selecting crashes, the edges are roughly drawn and are not intended to convey any detailed information about the environmental, economic, auditory, or other effects of the interchange. The interchange polygons are not intended to indicate anything about the data reporting requirements of the Highway Performance Monitoring System. At locations where interchange ramps intersected with surface streets, the boundaries were drawn to encompass approximately 250 feet around the ramp intersection. This distance was used as a general parameter of an “intersection influence” area for crashes, though a detailed analysis would be needed to determine which crashes would actually be logically linked to the ramp intersection.</span></p><p style='margin:0;'> </p><p><span>Below is the list and description of the attribute fields provided in the interchange inventory.</span></p><ul><li><span>InterchangeID. Unique alphanumeric identifier for each interchange polygon. Sequentially numbered in the format of: “TSUINTCXXXXX”</span></li><li><span>LogicalName. Descriptive name of the interchange (e.g., I-277 at US 74/NC 27/Independence Ave | Exit 2B). Combination of the routes that converge at the interchange, in the format of: [main freeway name] at [route number] / [local name of street] | Exit [exit number]</span></li><li><span>InterchangeType. General category of interchange design type. </span></li><li><span>County. County location of intersection. If an interchange crosses a county boundary, both counties are included. County name</span></li><li><span>MunicipalBoundary. Indicates if Interchange polygon intersects with a municipal boundary polygon feature. Yes, No</span></li><li><span>SmoothUrbanBoundary. Indicates if Interchange polygon intersects with a Smoothed Urban Boundaries polygon feature Yes, No</span></li><li><span>ManualGeom. Indicates if the interchange polygon was modified manually following the initial feature creation by the automated process. Yes, No</span></li><li><span>LastEdited. Date of last edit to feature Date</span></li><li><span>EditedBy. User who made the last edit to feature User name</span></li><li><span>Notes. Descriptive notes regarding changes to the feature Descriptive text</span></li><li><span>InterchangeSubType. Additional categorization for certain interchange types Descriptive text</span></li><li><span>SapCountyCode. County number Numeric</span><br /> </li></ul><p>Please contact Daniel Carter, NCDOT Traffic Safety Unit at <a href='mailto:dlcarter4@ncdot.gov' rel='nofollow ugc'>dlcarter4@ncdot.gov</a> with any questions.</p></div></div></div>
NC Traffic Safety Interchange Inventory 2021 – NC Department of Transportation
2021-02-01T00:00:00
vector digital data
Traffic Safety Interchange Inventory
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
Traffic Safety Engineer
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
Data collection is complete.
-83.539351
-76.291615
36.546218
33.892426
1
2021-02-01T00:00:00
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
PolygonNorth CarolinaNCDOTLocationInterchangeTraffic Safety UnitRoadsHighwaysTransportationSafetyScreeningAnalysis
User
2021-02-01T00:00:00
2021-02-01T00:00:00
Polygon
NCDOT
Location
Interchange
Transportation Safety Unit
Transportation
Roadway Inventory
Roads
Highways
Ramps
Safety
Screening
Analysis
Inventory of interchanges in North Carolina, developed for traffic safety analysis. This dataset is version 2, developed and published in January 2026.
North Carolina Department of Transportation, Transportation Safety Unit; NCDIT-Transportation, GIS Unit.
Contact Daniel Carter, dlcarter4@ncdot.gov with any questions.
Support and maintenance of the spatial database where this data resides is handled by the North Carolina Department of Transportation Traffic Safety Unit.
<DIV STYLE="text-align:Left;"><DIV><DIV><DIV STYLE="font-size:12pt"><P STYLE="margin:0 0 0 0;"><SPAN>This interchange inventory was developed to be used primarily in Traffic Safety analysis, though other users within NCDOT as well as external users may find this dataset useful. However, all users should be aware that this dataset was constructed to be suitable for the goals of planning level crash analysis and safety screening. As such, the level of detail and accuracy may not be appropriate for more detailed analysis. For example, the borders of each interchange polygon were drawn in a manner that would ensure that a safety analysis would identify crashes within the boundary that may be related to the interchange. Further detailed safety analysis and examination of crash reports would follow this high-level identification. To allow for inaccuracies in crash geolocation or data errors, the boundaries of the interchange polygons typically encompass an area much wider than the actual paved roadway. Since the boundaries are only intended to be used in selecting crashes, the edges are roughly drawn and are not intended to convey any detailed information about the environmental, economic, auditory, or other effects of the interchange. At locations where interchange ramps intersected with surface streets, the boundaries were drawn to encompass approximately 250 feet around the ramp intersection. This distance was used as a general parameter of an “intersection influence” area for crashes, though a detailed analysis would be needed to determine which crashes would actually be logically linked to the ramp intersection.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>The North Carolina Department of Transportation shall not be held liable for any errors in this data. This includes errors of omission, commission, errors concerning the content of the data, and relative and positional accuracy of the data. This data cannot be construed to be a legal document. Primary sources from which this data was compiled must be consulted for verification of information contained in this data. This dataset does not replace locally verified data.</SPAN></P></DIV></DIV></DIV></DIV>
The North Carolina Department of Transportation shall not be held liable for any errors in this data. This includes errors of omission, commission, errors concerning the content of the data, and relative and positional accuracy of the data. This data cannot be construed to be a legal document. Primary sources from which this data was compiled must be consulted for verification of information contained in this data. This dataset does not replace locally verified data.
The North Carolina Department of Transportation shall not be held liable for any errors in this data. This includes errors of omission, commission, errors concerning the content of the data, and relative and positional accuracy of the data. This data cannot be construed to be a legal document. Primary sources from which this data was compiled must be consulted for verification of information contained in this data. This dataset does not replace locally verified data.
None
Esri ArcGIS 12.9.4.32739
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
North Carolina Department of Transportation, Transportation Safety Unit; NCDIT-Transportation, GIS Unit.
Support and maintenance of the spatial database where this data resides is handled by the North Carolina Department of Transportation Traffic Safety Unit.
User
2021-02-01T00:00:00
2021-02-01T00:00:00
North Carolina
dataset
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
20230430
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
This dataset was originally created by the NCDOT to provide a geographic representation of the locations of all interchanges in North Carolina. This dataset was derived from multiple datasets including - the NCDOT publication datasets NCRoutes and NCRouteCharacteristics, the Smoothed 2010 Census Urbanized Boundaries dataset, the Municipal Boundaries dataset, the Highway Exit dataset, and the County Boundaries dataset. An ETL FME workbench called InterchangesInventoryCreation details the specific use of each dataset. Following the ETL some Interchange polygons were manually edited to more accurately describe the interchange. The fields InterchangeType and InterchangeSubType were also manually populated.
An ETL tool was used to locate interchanges throughout North Carolina. The tool also added some basic attribution.
2021-02-01T00:00:00
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
The data produced by the ETL tool was manually edited and enriched to better describe interchange locations, interchange types and interchange subtypes.
2021-02-01T00:00:00
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
The data was reviewed by NCDOT Traffic Safety Unit and found suitable for their use.
2021-02-01T00:00:00
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
Metadata content was added to the feature class.
2021-04-19T00:00:00
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
Traffic Safety Engineer
North Carolina Department of Transportation, Transportation Safety Unit
After processing, the dataset is checked for drawing display and number of records and file sizes compared with source materials.
NCDOT Geospatial Data Specifications
2021-02-01T00:00:00
2021-02-01T00:00:00
Pass.
1
This dataset is converted to file geodatabase (FGDB) format using tools in ArcGIS. The geometry is checked, and if needed repaired.
NCDOT Geospatial Data Specifications
2021-02-01T00:00:00
2021-02-01T00:00:00
Pass.
1
The source data was checked using standard review procedures. Attributes were checked by using visual inspection as well as automated verification routines. Geometry checks were conducted using Esri's Data Reviewer tool.
NCDOT Geospatial Data Specifications
2021-02-01T00:00:00
2021-02-01T00:00:00
Pass.
1
File Geodatabase Feature Class
February 1, 2021
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
EPSG
6.12(9.0.0)
North Carolina Department of Transportation, Transportation Safety Unit
TEAAS_Support@ncdot.gov
750 North Greenfield Parkway
Garner
NC
27529
US
919-814-5000
Hours: 9:00am - 5:00pm Monday – Friday
Please send an email with any issues, questions or comments regarding the Interchange Inventory data. If it is an immediate need, please call the contact number or indicate as such in the subject line in an email.
North Carolina Department of Transportation, Transportation Safety Unit
Traffic Safety Engineer
InterchangePolygons_v2_Merged
Interchange Inventory
North Carolina Department of Transportation, Transportation Safety Unit
Feature Class
0
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
SHAPE
Shape
Geometry
0
0
0
Feature geometry.
Esri
Coordinates defining the features.
InterchangeID
InterchangeID
String
20
0
0
Unique alphanumeric identifier for the interchange polygon.
NCDOT
Unique values. ID begins with “TSUNITC” followed by numerical values.
LogicalName
LogicalName
String
150
0
0
List of intersecting roads within the interchange polygon.
NCDOT
Text.
InterchangeType
InterchangeType
String
100
0
0
Interchange design type.
NCDOT
Complex multi-interchange
Two or more interchanges that have shared parts or interchanges that involve three or more routes.
NCDOT
Diamond
Direct ramps that intersect cross street at grade.
NCDOT
Diverging Diamond
Directions of travel on the cross street are crossed over each other (braided) prior to passing over the freeway. Normal left-side/right-side driving is backwards on the bridge.
NCDOT
Double roundabout interchange
Direct ramps intersect the cross street at two separated roundabouts.
NCDOT
Four-leg all-directional
Four legs with flyover ramps for leftward movements (no loops).
NCDOT
Full cloverleaf
Four directional ramps with four loop ramps.
NCDOT
Other
Interchange that does not neatly fall in another category.
NCDOT
Partial cloverleaf
Combination of direct ramps and one, two, or three loops.
NCDOT
Partial interchange
Not all movements from freeway to cross street or freeway to freeway are provided.
NCDOT
Semi-directional
Combination of loops and flyover ramps for leftward movements.
NCDOT
Single point interchange
All leftward movements from ramps are brought to a central point (either on a bridge or under a bridge).
NCDOT
Three-leg directional
Three legs with flyover ramps for leftward movements (no loops).
NCDOT
Trumpet
Three leg interchange with a loop ramp and flyover ramp forming a shape like the bell of a trumpet.
NCDOT
County
County
String
30
0
0
County location of intersection. If an interchange crosses a county boundary, both counties are included.
NCDOT
Text.
MunicipalBoundary
MunicipalBoundary
String
3
0
0
Indicates if Interchange polygon intersects with a municipal boundary polygon feature.
NCDOT
Yes
The interchange polygon intersects with a municipal boundary polygon feature.
NCDOT
Yes
The interchange polygon does not intersect with a municipal boundary polygon feature.
NCDOT
SmoothUrbanBoundary
SmoothUrbanBoundary
String
3
0
0
Indicates if Interchange polygon intersects with a Smoothed Urban Boundaries polygon feature.
NCDOT
Yes
The interchange polygon intersects with a Smoothed Urban Boundaries polygon feature.
NCDOT
No
The interchange polygon does not intersect with a Smoothed Urban Boundaries polygon feature.
NCDOT
ManualGeom
ManualGeom
String
3
0
0
Indicates if the interchange polygon was modified manually following the initial feature creation by the automated process.
NCDOT
Yes
The interchange polygon was modified manually following the initial feature creation by the automated process.
NCDOT
No
The interchange polygon was not modified manually following the initial feature creation by the automated process.
NCDOT
SHAPE_Length
Shape_Length
Double
8
0
0
Length of feature in internal units.
Esri
Positive real numbers that are automatically generated.
SHAPE_Area
Shape_Area
Double
8
0
0
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
LastEdited
LastEdited
String
50
0
0
Date of last edit to the interchange polygon. Null values indicate no edits have been made to the polygon since its initial creation. This field tracks any edits performed to the polygon.
NCDOT
Dates vary.
EditedBy
EditedBy
String
50
0
0
Name of editor if any edits have been done to the interchange polygon. Null values indicate no edits have been made to the polygon since its initial creation. This field tracks who, if anyone, has edited the polygon.
NCDOT
Text.
Notes
Notes
String
150
0
0
Additional information about the interchange.
NCDOT
Text.
InterchangeSubtype
InterchangeSubtype
String
100
0
0
Secondary Interchange facility design type. This field may contain additional description of the type of interchange, if the interchange type can be divided into subtypes.
NCDOT
Text.
SapCountyCode
SapCountyCode
Integer
4
0
0
SAP County code value. Provided for SAP enterprise software integration purposes. Values range from 1 (Alamance) - 100 (Yancey).
NCDOT
1
100
CountyNumber
CountyNumber
Integer
4
0
0
County code value. Provided for integration purposes where the 0 - 99 range of values are used to identify counties. Values range from 0 (Alamance) - 99 (Yancey).
NCDOT
99
<DIV STYLE="text-align:Left;"><DIV><DIV STYLE="font-size:12pt"><P STYLE="margin:0 0 0 0;"><SPAN>This interchange inventory was developed to be used primarily in Traffic Safety analysis, though other users within NCDOT as well as external users may find this dataset useful. However, all users should be aware that this dataset was constructed to be suitable for the goals of planning level crash analysis and safety screening. As such, the level of detail and accuracy may not be appropriate for more detailed analysis. For example, the borders of each interchange polygon were drawn in a manner that would ensure that a safety analysis would identify crashes within the boundary that may be related to the interchange. Further detailed safety analysis and examination of crash reports would follow this high-level identification. To allow for inaccuracies in crash geolocation or data errors, the boundaries of the interchange polygons typically encompass an area much wider than the actual paved roadway. Since the boundaries are only intended to be used in selecting crashes, the edges are roughly drawn and are not intended to convey any detailed information about the environmental, economic, auditory, or other effects of the interchange. At locations where interchange ramps intersected with surface streets, the boundaries were drawn to encompass approximately 250 feet around the ramp intersection. This distance was used as a general parameter of an “intersection influence” area for crashes, though a detailed analysis would be needed to determine which crashes would actually be logically linked to the ramp intersection.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>The North Carolina Department of Transportation shall not be held liable for any errors in this data. This includes errors of omission, commission, errors concerning the content of the data, and relative and positional accuracy of the data. This data cannot be construed to be a legal document. Primary sources from which this data was compiled must be consulted for verification of information contained in this data. This dataset does not replace locally verified data.</SPAN></P></DIV></DIV></DIV>
The North Carolina Department of Transportation shall not be held liable for any errors in this data. This includes errors of omission, commission, errors concerning the content of the data, and relative and positional accuracy of the data. This data cannot be construed to be a legal document. Primary sources from which this data was compiled must be consulted for verification of information contained in this data. This dataset does not replace locally verified data.
none
0
Simple
FALSE
0
TRUE
FALSE