HIGH INJURY NETWORK ANALYSIS
The high injury network analysis highlights roads in the GVMC planning area that have a history of crashes based on data from 2018 – 2022 (the study period). Crash types that were used for the development of this map were one of two formal crash types:
- Fatal and Serious Injury (FSI) crashes for more common crash modes (motor vehicle, motorcycle, and all transportation modes), or
- Fatal and Injury (FI) crashes for less common crash modes (pedestrian and bicyclist).
Crashes were overlayed on the roads, and examined in segments ( like 0.2 miles for major roads and 0.1 mile for others). This allowed crash patterns to be easily identified. The darker the color, the more crashes that have resulted in deaths and/or injuries have occurred.
All analysis results include crashes from 2018 – 2022 and summarized in the All Modes (FSI) score which can be seen by clicking on map features. The map below visualizes the top 15% of locations based on their respective scores.
- All Mode FSI Crash Score: Total number of fatal or serious injury crashes of any mode
HIGH RISK NETWORK ANALYSIS
The high risk network analysis focuses on roads that have design features linked to higher crash patterns. These are areas to proactively focus on building safety improvements.
To develop this map, roads are studied to determine design features may be linked to more crashes. Each road gets a risk score based on how many crashes similar roads had in the GVMC planning area. Roads are then ranked into five risk levels:
Critical,
High,
Medium,
Low, and
Minimal. The study looks at various road features to determine these scores.
- Roadway Class: Major Road (functional class of minor arterial and above or major/primary local roads) or Minor Road (all others)
- Lane Configuration: Two-lane or Multilane
- Setting: Urban or Rural context
- Traffic Volume: Average annual daily traffic (<1,000, 1,000-10,000, or 10,000+)
- Speed Category: Posted speed limit (≤30 MPH, 35-45 MPH, or 50+ MPH)
- % Zero Vehicle Households: Percent of households within the census block group which have zero vehicles
- % in Poverty: Percent of population within the census block group at or below 2X the poverty level
- % Young Residents: Percent of population within the census block group below the age of 18
- % Old Residents: Percent of population within the census block group age 65 years or older
- % Disabled Residents: Percent of population within the census block group with a disability
- Housing Cost Burden: Percent of households within the census block group which spend more than 30% of income on housing
- Transportation Access: Equitable Transportation Communities data transportation access subcomponent score
The results are shown on the map by highlighting the
Critical,
High, and
Medium risk areas. Details like average risk scores and descriptions are available by clicking on the map features.