This data set contains crash rate analysis data based on 5 years of long form crash reports located on the State Highway System (SHS) and analyzed by location based on the rate of crashes per Million Vehicle Miles (MVM), which is a length-weighted accumulation based on the Annual Average Daily Traffic (AADT) figures from the FDOT Roadway Characteristics Inventory (RCI) database for each of the years included in the study.
Purpose:
The FDOT GIS Basemap Routes feature class provides spatial information on
Florida Basemap Routes, as well attribute information compatible with the
Roadway Characteristics Inventory (RCI) database. Furthermore, the spatial data
also contains measures (m-values) that can be used for event mapping. The
crash rate analysis data is intended for use in targeting safety improvements.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 20100503
Currentness_Reference: publication date
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -87.429040
East_Bounding_Coordinate: -79.872251
North_Bounding_Coordinate: 30.983191
South_Bounding_Coordinate: 24.492815
Keywords:
Theme:
Theme_Keyword_Thesaurus: NONE
Theme_Keyword: Transportation
Theme_Keyword: Basemap Routes
Theme_Keyword: Roads
Theme_Keyword: Linear Referencing
Theme_Keyword: Event Mapping
Theme_Keyword: Measures
Theme_Keyword: Route System
Theme_Keyword: Dynamic Segmentation
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Florida
Access_Constraints: For FDOT use only
Use_Constraints:
This product has been compiled from the most accurate source data from the
Florida Department of Transportation's (FDOT) Transportation Statistics Office and
the FDOT Safety Office's Crash Analysis Reporting (CAR) database for the
2005-2009 crash rate analyses. However, this product is for reference purposes
only and is not to be construed as a legal document or survey instrument. Any
reliance on the information contained herein is at the user's own risk. The Florida
Department of Transportation assumes no responsibility for any use of the
information contained herein or any loss resulting therefrom.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Florida Department of Transportation, Safety Office
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
GeoPlan relied on the integrity of the attribute information within
the original data.
Logical_Consistency_Report: All data for this dataset are logically consistent.
Completeness_Report: This dataset is complete as of date of production.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
This data is provided 'as is' and its horizontal positional accuracy
has not been verified by GeoPlan
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
This data is provided 'as is' and its vertical positional accuracy
has not been verified by GeoPlan
Lineage:
Source_Information:
Source_Scale_Denominator: 24000
Type_of_Source_Media:
Source_Citation_Abbreviation: FDOT
Source_Contribution: Spatial and Attribute Information
Process_Step:
Process_Description:
This dataset was created using ESRI event mapping. The route system is the
Transportation Statistics' basemap routes. The event source is an oracle table
that is created with the following query:
select * from roadway
The conversion of these events into a shapefile includes specifying the shapefile
geometry should contain measure values (M-values) which means that this dataset
may be used as a route source for subsequent event mapping of tabular data that
contains a roadway identifier and milepost information that complies with the
Florida Department of Transportation's Roadway Characteristics Inventory (RCI)
milepost logic.
Process_Date: 20100503
Process_Step:
Process_Description:
GeoPlan received data in shapefile format from Benjamin.Jacobs@dot.state.fl.us
in April 2011. When received the data was in UTM. The shapefile was projected
to Albers HPGN.
The following qaqc procedures were performed:
-Added SFTY_RATIO based on following equations:
ACTUALRATE / STATE_AVG
-Added SFTY_NUM field. Calculated numbers based on the values from the safety ratio.
There are 3 valid values:
1 = Safety ratio greater than 1
2 = Can't calculate safety ratio because state average = 0
3 = Safety ratio less than 1
-Added AXL field. Calculated numbers based on the values from the safety ratio.
There are 5 valid values:
1 = 0.0 - 0.75 - number of crashes is below the average for a similar facility
2 = 0.75 - 0.90 - number of crashes is approaching the average for a similar facility
3 = 0.9 -1.0 - number of crashes is close but below the average for a similar facility
4 = 1.0- 1.10 - number of crashes is close but above the average for a similar facility
5 = > >1.10 - number of crashes exceeds the average for a similar facility
-Upcased
-Added DESCRIPT based on STATERD
-Added FGDLAQDATE based on date data was received from source
-Changed name from 2009_5yrCrashRates_withDistrict&StateAvgs.shp to FDOT_CRASH_COUNTS_2009
Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ID
Attribute_Definition: Undefined by Source
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: RDWYID
Attribute_Definition:
A unique 8-character identification number assigned to a roadway or section of a roadway on State Highway System for which information is maintained in the Department's Roadway Characteristics Inventory (RCI).
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: STATERD
Attribute_Definition:
Lowest-numbered State Road number for the identified segment of roadway.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: CRRATECD
Attribute_Definition:
2-digit code identifies the type of roadway: urban/suburban/rural, number of lanes, divided/undivided/, median type.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: BEGMP
Attribute_Definition:
The mile-point along the inventoried roadway at which the analyzed segment starts.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: ENDMP
Attribute_Definition:
The mile-point along the inventoried roadway at which the analyzed segment ends.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: ACTUALRATE
Attribute_Definition:
The number of crashes per Million Vehicle Miles (MVM) that have occurred on the identified roadway segment during the calendar years spanned by the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: DIST_AVG_R
Attribute_Definition:
The average number of crashes per Million Vehicle Miles (MVM) that have occurred on roadway segments of the same type within the same managing district during the calendar years spanned by the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: CRASH_COUN
Attribute_Definition:
The total number of crashes that have occurred on the identified roadway segment within the year-span of the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: FATAL_COUN
Attribute_Definition:
The total number of fatalities due to crashes that have occurred on the identified roadway segment within the year-span of the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: INJURY_COU
Attribute_Definition:
The total number of injuries due to crashes that have occurred on the identified roadway segment within the year-span of the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: PDO_COUNT
Attribute_Definition:
The total number of non-injury crashes that were reported on long-form crash reports that have occurred on the identified roadway segment within the year-span of the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: AADT
Attribute_Definition:
The Annual Average Daily Traffic along the identified roadway segment, accumulated and averaged across the year-span of the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: CONF_PCT
Attribute_Definition:
The percent confidence that the crash rate for the analyzed segment is higher than average for segments of the same type within the managing district over the same time-span. 50% is not-confident. Safety Office considers segments with confidence greater than 90 percent to be "high crash" segments.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: STATE_AVG_
Attribute_Definition:
The average number of crashes per Million Vehicle Miles (MVM) that have occurred on roadway segments of the same type within the state during the calendar years spanned by the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: MVM_calc
Attribute_Definition:
The total Millions of Vehicle Miles traveled on the identified roadway segment for the entire year-span of the analysis.
Attribute_Definition_Source: FDOT Safety Office
Attribute:
Attribute_Label: SFTY_RATIO
Attribute_Definition:
Safety ratio, calculated by the following formula: ACTUALRATE / STATE_AVG
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: SFTY_NUM
Attribute_Definition: Number representing safety ratio. There are 3 valid values:
Attribute_Definition_Source: GeoPlan
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition: Safety ratio greater than 1
Enumerated_Domain:
Enumerated_Domain_Value: 2
Enumerated_Domain_Value_Definition: Can't calculate safety ratio because state average = 0
Enumerated_Domain:
Enumerated_Domain_Value: 3
Enumerated_Domain_Value_Definition: Safety ratio less than 1
Attribute:
Attribute_Label: AXL
Attribute_Definition: Suggested color coding for safety crash ratio by Imran Ghani
Attribute_Definition_Source: GeoPlan
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 1
Enumerated_Domain_Value_Definition:
0.0 - 0.75 - number of crashes is below the average for a similar facility
Enumerated_Domain:
Enumerated_Domain_Value: 2
Enumerated_Domain_Value_Definition:
0.75 - 0.90 - number of crashes is approaching the average for a similar facility
Enumerated_Domain:
Enumerated_Domain_Value: 3
Enumerated_Domain_Value_Definition:
0.9 -1.0 - number of crashes is close but below the average for a similar facility
Enumerated_Domain:
Enumerated_Domain_Value: 4
Enumerated_Domain_Value_Definition:
1.0- 1.10 - number of crashes is close but above the average for a similar facility
Enumerated_Domain:
Enumerated_Domain_Value: 5
Enumerated_Domain_Value_Definition:
1.10 - number of crashes exceeds the average for a similar facility
Attribute:
Attribute_Label: DESCRIPT
Attribute_Definition: GeoPlan added field based on STATERD
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: FGDLAQDATE
Attribute_Definition: Date GeoPlan acquired data from source
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: AUTOID
Attribute_Definition: Unique ID added by GeoPlan
Attribute_Definition_Source: GeoPlan
Attribute:
Attribute_Label: SHAPE.LEN
Attribute_Definition: Length in meters
Attribute_Definition_Source: GeoPlan
Overview_Description:
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Florida Geographic Data Library (FGDL)
The Florida Geographic Data Library is a collection of Geospatial Data
compiled by the University of Florida GeoPlan Center with support from
the Florida Department of Transportation. GIS data available in FGDL is
collected from various state, federal, and other agencies (data sources)
who are data stewards, producers, or publishers. The data available in
FGDL may not be the most current version of the data offered by the
data source. University of Florida GeoPlan Center makes no guarantees
about the currentness of the data and suggests that data users check
with the data source to see if more recent versions of the data exist.
Furthermore, the GIS data available in the FGDL are provided 'as is'.
The University of Florida GeoPlan Center makes no warranties, guaranties
or representations as to the truth, accuracy or completeness of the data
provided by the data sources. The University of Florida GeoPlan Center
makes no representations or warranties about the quality or suitability
of the materials, either expressly or implied, including but not limited
to any implied warranties of merchantability, fitness for a particular
purpose, or non-infringement. The University of Florida GeoPlan Center
shall not be liable for any damages suffered as a result of using,
modifying, contributing or distributing the materials.
A note about data scale:
Scale is an important factor in data usage. Certain scale datasets
are not suitable for some project, analysis, or modeling purposes.
Please be sure you are using the best available data.
1:24000 scale datasets are recommended for projects that are at the
county level.
1:24000 data should NOT be used for high accuracy base mapping such
as property parcel boundaries.
1:100000 scale datasets are recommended for projects that are at the
multi-county or regional level.
1:125000 scale datasets are recommended for projects that are at the
regional or state level or larger.
Vector datasets with no defined scale or accuracy should be
considered suspect. Make sure you are familiar with your data
before using it for projects or analysis. Every effort has been
made to supply the user with data documentation. For additional
information, see the References section and the Data Source Contact
section of this documentation. For more information regarding
scale and accuracy, see our webpage at:
<http://geoplan.ufl.edu/education.html>