TransStats_HCL20062010
Metadata also available as
Metadata:
- Identification_Information:
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- Citation:
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- Citation_Information:
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- Originator: VT Agency of Transportation
- Publication_Date: 20131121
- Publication_Time: unknown
- Title: TransStats_HCL20062010
- Edition: 2006-2010
- Geospatial_Data_Presentation_Form: vector digital data
- Series_Information:
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- Series_Name: High Crash Locations (HCL) between 2006 and 2010
- Issue_Identification: 2006-2010
- Publication_Information:
-
- Publication_Place: Montpelier, VT 05633
- Publisher: GIS Database Administrator
- Other_Citation_Details: Tile Structure - STATE
- Description:
-
- Abstract:
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The HCL20062010 dataset contains High Crash Locations (HCLs) for intersections and sections for data years 2006-2010.
The HCLs in this dataset are based on the number of crashes and not the severity of the crashes.
The intersections and sections analyzed in this dataset are limited to those highways that fall under the Federal Aid Highway system.
A good overview of of the 2006-2010 HCL data is available in this PDF
<http://vtransplanning.vermont.gov/sites/aot_policy/files/documents/highwayresearch/2006-2010_High_Crash_Location_Report.pdf>
- Purpose: Provide a dataset identifying High Crash Locations in Vermont.
- Time_Period_of_Content:
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- Time_Period_Information:
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- Single_Date/Time:
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- Calendar_Date: 2006 to 2010
- Time_of_Day: Unknown
- Currentness_Reference: Ground Conditions
- Status:
-
- Progress: Complete
- Maintenance_and_Update_Frequency: Irregular
- Spatial_Domain:
-
- Bounding_Coordinates:
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- West_Bounding_Coordinate: -73.394156
- East_Bounding_Coordinate: -71.580445
- North_Bounding_Coordinate: 45.002172
- South_Bounding_Coordinate: 42.758077
- Keywords:
-
- Theme:
-
- Theme_Keyword_Thesaurus: ISO 19115 Topic Category
- Theme_Keyword: transportation
- Theme:
-
- Theme_Keyword_Thesaurus: None
- Theme_Keyword: crashes
- Theme_Keyword: accidents
- Theme_Keyword: high crash locations
- Theme_Keyword: HCL
- Place:
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- Place_Keyword_Thesaurus: None
- Place_Keyword: Vermont
- Temporal:
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- Temporal_Keyword_Thesaurus: None
- Temporal_Keyword: 2006 to 2010
- Access_Constraints:
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VCGI and the State of VT make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
- Use_Constraints: None.
- Point_of_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Database Administrator
- Contact_Organization: Vermont Agency of Transportation (VTrans) - Mapping & GIS Unit
- Contact_Position: VTrans GIS Database Administrator
- Contact_Address:
-
- Address_Type: mailing and physical address
- Address: VTrans - Technical Services Division
- Address: The National Life Building
- Address: Drawer 33
- City: Montpelier
- State_or_Province: VT
- Postal_Code: 05633-5001
- Country: USA
- Contact_Voice_Telephone: 802/828-2600
- Contact_TDD/TTY_Telephone: None
- Contact_Facsimile_Telephone: 802/828-2334
- Contact_Electronic_Mail_Address: johnathan.croft@state.vt.us
- Hours_of_Service: 8:00am - 4:30pm, M-F
- Data_Set_Credit: VTrans Traffic Research
- Security_Information:
-
- Security_Classification_System: N/A
- Security_Classification: Unclassified
- Security_Handling_Description: No Security Considerations
- Native_Data_Set_Environment:
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Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000
- Data_Quality_Information:
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- Attribute_Accuracy:
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- Attribute_Accuracy_Report: Refer to the logical consistency report
- Logical_Consistency_Report:
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The following language was pulled from the HCL 2006-2010 narrative summary available
from this URL
<http://vtransplanning.vermont.gov/sites/aot_policy/files/documents/highwayresearch/2006-2010_High_Crash_Location_Report.pdf>
As noted above, this HCL dataset includes intersections and sections that involve
Federal Aid eligible highways only.
The intersections are analyzed based on predefined intersection limits:
In rural areas, the posted speed limit is used to determine the standard for
Stopping Sight Distance (SSD) as identified in the AASHTO handbook.
Each leg of an intersection should be identified and the SSD determined
for the intersection influence. The SSD length acts as that leg’s influence
length. In rural areas (as identified by the Functional Classification Map)
this table is used directly.
In suburban (built up areas outside of the designated urban area) and urban
areas (as identified by the Functional Classification Map) the intersection
influence process takes into account overlapping areas of intersection
influence from adjacent intersections. In suburban areas we use the SSD
table results for each leg, and in the case where legs of two adjacent
intersections overlap, the difference is split.
For urban areas, the length of influence for each approach on an
intersection is 0.01 mile.
Highway sections are analyzed based on a sliding 0.30 mile section, one 0.10 mile
at a time, along the entire length of a route.
Where an HCL intersection occurs within the area of an HCL section, the
intersection HCL rules and will be listed in this report and the HCL sections for the legs
of the intersection will not be listed.
In the event of overlapping HCL sections, the HCL listed in this report will be
those sections with the higher Actual/Critical ratio. When overlapping occurs, it is an
indication that the listed HCL section may be part of a longer HCL.
All HCLs in the attached tables that are located within the limits of an anticipated
project (as identified in the Capital Program) are flagged with an asterisk (*). Projects
include highway or bridge realignment or reconstruction, but do not include paving nor
bridge rehabilitation. Further, project flag (*) includes widening, signals, and pavement
markings (such as for new turn lanes).
All HCLs that are located within a Class 1 Town Highway section are noted with
the number symbol (#).
Although an HCL may rank very high on the listing, in-depth study must be
conducted to determine the feasibility of corrective measures before adding the location
to the construction program.
For a Section or Intersection to be identified as an HCL, two criteria must be
satisfied:
1. The location must have experienced five (5) or more crashes in a fiveyear
period, or the average of one (1) crash per year, and;
2. The Actual/Critical ratio must be 1.000 or higher. Formulas to
calculate this information are on the following page.
This report includes HCLs where the Actual Rate to Critical Rate Ratio is 1.0 or
greater.
Misc Notes
Roundabouts and Traffic Circles in this report are treated as individual
intersections. As an example, the VT-9 and US-5 roundabout in Brattleboro is treated
as a four leg intersection for purposes of this report.
There exists along many routes what we refer to as “ghost” sections. These are
highway sections where the physical mileage (or Mile Marker) points are noncontiguous.
As an example: A VT numbered route runs for several miles until it comes
to an intersection with a US route. Then you have to traverse a part of the US route in
order to get to the continuation of the VT route. Therefore, the Mile Marker points for
the VT route are not physically continuous, but separated by the length of the US route.
- Positional_Accuracy:
-
- Horizontal_Positional_Accuracy:
-
- Horizontal_Positional_Accuracy_Report: Unknown
- Vertical_Positional_Accuracy:
- Lineage:
-
- Source_Information:
-
- Source_Citation:
-
- Citation_Information:
-
- Originator: VTrans Traffic Research
- Publication_Date: 20131121
- Publication_Time: unknown
- Title: High Crash Locations: 2006 - 2010
- Geospatial_Data_Presentation_Form: tabular digital data
- Publication_Information:
-
- Publication_Place: Montpelier, VT
- Publisher: VTrans Traffic Research
- Type_of_Source_Media: tabular digital data
- Source_Time_Period_of_Content:
-
- Time_Period_Information:
-
- Single_Date/Time:
-
- Calendar_Date: 2006 - 2010
- Time_of_Day: Unknown
- Source_Citation_Abbreviation: HCL
- Source_Contribution: VTrans
- Process_Step:
-
- Process_Description:
-
VCGI received copy of HCL 2006-2010 intersections and sections.
from VTrans Mapping Unit. Data was loaded into the VGIS Data Warehouse for
public distribution. Metadata was drafted and posted.
- Process_Date: 20131121
- Process_Time: Unknown
- Process_Contact:
-
- Contact_Information:
-
- Contact_Person_Primary:
-
- Contact_Person: Steve Sharp
- Contact_Organization: VCGI
- Contact_Position: GIS Database Administrator
- Spatial_Data_Organization_Information:
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- Indirect_Spatial_Reference: LINE
- Direct_Spatial_Reference_Method: Vector
- Point_and_Vector_Object_Information:
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- SDTS_Terms_Description:
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- SDTS_Point_and_Vector_Object_Type: String
- Point_and_Vector_Object_Count: 133
- SDTS_Terms_Description:
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- SDTS_Point_and_Vector_Object_Type: String
- Point_and_Vector_Object_Count: 683
- Spatial_Reference_Information:
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- Horizontal_Coordinate_System_Definition:
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- Planar:
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- Grid_Coordinate_System:
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- Grid_Coordinate_System_Name: State Plane Coordinate System 1983
- State_Plane_Coordinate_System:
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- SPCS_Zone_Identifier: 4400
- Transverse_Mercator:
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- Scale_Factor_at_Central_Meridian: 0.999964
- Longitude_of_Central_Meridian: -72.500000
- Latitude_of_Projection_Origin: 42.500000
- False_Easting: 500000.000000
- False_Northing: 0.000000
- Planar_Coordinate_Information:
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- Planar_Coordinate_Encoding_Method: coordinate pair
- Coordinate_Representation:
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- Abscissa_Resolution: 0.000156
- Ordinate_Resolution: 0.000156
- Planar_Distance_Units: meters
- Geodetic_Model:
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- Horizontal_Datum_Name: North American Datum of 1983
- Ellipsoid_Name: Geodetic Reference System 80
- Semi-major_Axis: 6378137.000000
- Denominator_of_Flattening_Ratio: 298.257222
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- Altitude_System_Definition:
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- Altitude_Resolution: 0.000156
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Explicit elevation coordinate included with horizontal coordinates
- Entity_and_Attribute_Information:
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- Detailed_Description:
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- Entity_Type_Label: TransStats_HCL20062010_Line_Intrsec
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- Attribute_Label: OBJECTID
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- Attribute_Label: Crashes
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- Attribute_Label: Fatalities
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- Attribute_Label: Injuries
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- Attribute_Label: PDO_Crashe
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Sequential unique whole numbers that are automatically generated.
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- Attribute_Label: Injuries
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- Attribute_Label: CriticalRa
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- Attribute_Label: RatioActua
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- Distribution_Information:
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- Distributor:
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- Contact_Information:
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- Contact_Organization_Primary:
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- Contact_Organization: VT Center for Geographic Information
- Contact_Address:
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- Address_Type: Mailing and Physical Address
- Address: 58 South Main Street, Suite 2
- City: Waterbury
- State_or_Province: VT
- Postal_Code: 05676
- Country: USA
- Contact_Voice_Telephone: 802/882-3000
- Contact_TDD/TTY_Telephone: None
- Contact_Facsimile_Telephone: 802/882-3001
- Contact_Electronic_Mail_Address: info@vcgi.org
- Hours_of_Service: 9am - 5pm, M-F
- Resource_Description: TransStats_HCL20062010
- Distribution_Liability:
-
VCGI and the State of Vermont make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.
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- Access_Instructions: Download from web site.
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- Fees:
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No charge when downloading from the internet, and when no custom processing is required.
- Ordering_Instructions:
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Download from web site or mail-fax a copy of the VCGI 'Data Request Form' which
is available from the VGIS web site <http://vcgi.vermont.gov/warehouse/order_forms>
- Turnaround: About 5 days.
- Custom_Order_Process:
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Mail or Fax a copy of the VCGI 'Data Request Form' which is available from <http://vcgi.vermont.gov/warehouse/order_forms>
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- Contact_Organization: VT Center for Geographic Information
- Contact_Person: GIS Database Administrator
- Contact_Address:
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- Address_Type: Mailing and Physical Address
- Address: 58 South Main Street, Suite 2
- City: Waterbury
- State_or_Province: VT
- Postal_Code: 05676
- Country: USA
- Contact_Voice_Telephone: 802/882-3000
- Contact_TDD/TTY_Telephone: None
- Contact_Facsimile_Telephone: 802/882-3001
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Generated by mp version 2.9.5 on Mon Dec 02 15:11:45 2013