Safety Analyses
Below are the results of safety analyses conducted for the Bloomington, Indiana SS4A Comprehensive Safety Action Plan. All analyses were conducted using crash data provided by the City of Bloomington, Indiana, used as-is. Crashes represent the years 2018 through 2022 and were filtered for fatal and serious injury (FSI) severities using the Fatality and Incapacitated fields, filtering for a value in either field of 1. Crash modes were identified using the Crash Type field.
Use the buttons below to select roadway or intersection high injury network locations to view mode-specific, interactive web maps.
High Injury Network Analysis (Roadways)
High injury network (HIN) analysis highlights roadway and intersection locations within the study area which have exhibited elevated frequencies of historical crashes. These locations present opportunities for safety improvement as part of a data-driven, reactive safety program. By targeting these high injury locations with proven safety infrastructure treatments, we can be sure that our investments will produce strong results for our road users.
Roadways were analyzed using a sliding window-type analysis approach with a step size of 0.1 miles and a window size of 0.5 miles, producing smoothed crash frequencies. For the roadway analysis, crashes which occurred near intersections were assigned to all intersection approaches within 10 meters to account for corridors patterns that traverse intersections. Intersections were analyzed by counting the total number of crashes along each approach to the intersection. For the intersection analysis, crashes were assigned only to the nearest intersection.
All analysis results are summarized in the following scores which can be seen by hovering over the map features. Each map below visualizes the top 15% of locations based on their respective scores. The scores are calculated for the 2018 through 2022 study period, summarizing the total number of FSI crashes at each facility as follows:
- All Mode FSI Crash Score: Total number of FSI crashes of any mode
- Motor Vehicle FSI Crash Score: Total number of FSI crashes involving only motor vehicles
- Pedestrian FSI Crash Score: Total number of FSI crashes involving pedestrians
- Bicyclist FSI Crash Score: Total number of FSI crashes involving bicyclists
- VRU FSI Crash Score: Total number of FSI crashes involving pedestrians or bicyclists
All Modes
Motor Vehicle
Pedestrian
Bicyclist
Scooter
Vulnerable Road User
High Injury Network Analysis (Intersections)
High injury network (HIN) analysis highlights roadway and intersection locations within the study area which have exhibited elevated frequencies of historical crashes. These locations present opportunities for safety improvement as part of a data-driven, reactive safety program. By targeting these high injury locations with proven safety infrastructure treatments, we can be sure that our investments will produce strong results for our road users.
Roadways were analyzed using a sliding window-type analysis approach with a step size of 0.1 miles and a window size of 0.5 miles, producing smoothed crash frequencies. For the roadway analysis, crashes which occurred near intersections were assigned to all intersection approaches within 10 meters to account for corridors patterns that traverse intersections. Intersections were analyzed by counting the total number of crashes along each approach to the intersection. For the intersection analysis, crashes were assigned only to the nearest intersection.
All analysis results are summarized in the following scores which can be seen by hovering over the map features. Each map below visualizes the top 15% of locations based on their respective scores. The scores are calculated for the 2018 through 2022 study period, summarizing the total number of FSI crashes at each facility as follows:
- All Mode FSI Crash Score: Total number of FSI crashes of any mode
- Motor Vehicle FSI Crash Score: Total number of FSI crashes involving only motor vehicles
- Pedestrian FSI Crash Score: Total number of FSI crashes involving pedestrians
- Bicyclist FSI Crash Score: Total number of FSI crashes involving bicyclists
- VRU FSI Crash Score: Total number of FSI crashes involving pedestrians or bicyclists
All Modes
Motor Vehicle
Pedestrian
Bicyclist
Scooter
Vulnerable Road User
High Risk Network Analysis
High risk network (HRN) analysis highlights roadway locations within the study area which share design and contextual attributes which correlate with elevated crash risk based on historical crash patterns. These locations present opportunities for safety improvement as part of a data-driven, proactive safety program.
Roadways were analyzed using the facility profile analysis methodology, which identifies unique combinations of roadway design and contextual attributes which correlate with elevated crash risk. The analysis produces a risk score for each roadway segment based on the frequency of crashes observed at similar facilities across the study area, representing the average number of crashes at comparable facilities during the study period. All facilities are categorized into one of five tiers based on their relative risk score, namely Critical, High, Medium, Low, and Minimal.
All analysis results are summarized in the following scores which can be seen by clicking on map features. Each map below visualizes the Critical, High, and Medium tier facilities for each mode. Average risk scores, facility tiers, and facility descriptions can be viewed for each facility by clicking on map features. Note: due to small sample size for some modes, HRN results are only available for all mode, motor vehicle, and vulnerable road user modes.