Case Study Tag: Systemic approach

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Iowa DOT Safety Impact Dashboard Development

Iowa
Traffic safety projects can produce varying impacts on safety performance. While some projects substantially reduce crashes, others may yield limited or unexpected measurable effects. Establishing a robust framework for tracking crash histories associated with safety projects is therefore essential for the Iowa DOT and other state DOTs to assess project effectiveness, efficiency, return on investment, and broader safety performance implications.
AASHTO Safety Summit 2026 Poster

A Proactive Path to Safer Roads: New Jersey DOT’s Systemic Safety Program

New Jersey
NJDOT’s systemic safety approach proactively reduces crash risk by applying low-cost, proven countermeasures across the network. The poster summarizes horizontal curve, wrong-way driving, school zones, signalized intersection, pedestrian, and bicyclist analyses using a machine learning approach.
AASHTO Safety Summit 2026 Poster

AASHTOWare: Prioritizing Roadway Departure Crashes

AASHTO
AASHTOWare compares and contrasts three methods for safety improvement location identification: 1) crash prediction model, 2) expected crash frequency exceeding threshold, and 3) crash prediction model + systemic safety characteristics.
AASHTO Safety Summit Poster 2025

FDOT’s Statewide Systemic Analysis

Florida
FDOT uses a data-driven, risk-based approach to guide systemic investments. Their systemic analysis led FDOT leadership to approve $35 million in HSIP funds, plus additional state funding for safety investments.
AASHTO Safety Summit Poster 2025

Louisiana Vulnerable Road User (VRU) Safety Assessment

Louisiana
Using a systematic, data-driven approach, Louisiana’s VRU Safety Assessment identified target areas for improvements and recommended infrastructure countermeasures, education, programs and policies. Priority factors were mapped to focus on areas for project implementation.
AASHTO Safety Summit Poster 2025LaDOTD VRU Safety Assessment

Don’t Wait, Be Proactive! Systemic Safety for Minnesota’s District Safety Plans

Minnesota
MnDOT updated road safety plans in every district with a systemic crash analysis. Analysis confirmed that higher crash densities and severe crashes occurred at locations with higher risk scores.
AASHTO Safety Summit 2025

Lane Constrictor Intersections in Minnesota

Minnesota
Concerned with rural intersections crashes, MnDOT developed a standard layout of lane constrictors. They installed lane constrictors at 61 side street, stop-controlled locations.
AASHTO Safety Summit Poster 2025Evaluation Report

A Comprehensive Approach for Friction-Enhancing Treatment Selection

Kentucky
Kentucky replaced a needs-based, hot-spot approach with a more precise, systemic, “solutions-based” approach to friction-enhancing treatments and improved pavement safety performance.
Kentucky LTAP VideoStudy DocumentFHWA Case Study

Systemic Safety Countermeasures and Collaborative Approaches at GDOT

Georgia
Georgia DOT uses crash data analysis to implement proactive, systemic safety countermeasures, improve safety for vulnerable users, optimize project delivery, and target unsafe driving behaviors.
TPM Peer Exchange Video, Sep. 2024

Systemic Countermeasures Implementation and Tracking

Virginia
Virginia DOT created a statewide inventory and tracking system for the performance of countermeasures, leading to better communication among employees and partners, and the ability to track ongoing progress.
2023 Safety Summit Poster
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