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State Safety Initiative Database

Explore relevant case studies by filtering via agency, keyword, or pre-set filters in the left menu, or by using the topic tags located at the bottom of the page.

MASH Test Level 3 Compliant Guardrail System on 1H to 1V Slope

Texas
Under some conditions, achieving the recommended 2-ft offset from guardrail posts to the slope break is challenging. Texas A&M Transportation Institute found a thrie-beam option would work in these conditions and pass MASH TL-3 tests.
Roadside Pooled Fund Test Report2024 Safety Summit Poster

Crash Testing of Electric Vehicles into W-Beam Guardrail and Roadside Barriers

Nebraska
Crash testing of electric vehicles (EVs) into W-beam guardrails revealed concerns about the compatibility of EVs with existing barriers due to increased weight from batteries. In the first test, a Tesla Model 3 penetrated under the guardrail, and in the second test, a Rivian R1T ruptured the guardrail and penetrated through the barrier.
University of Nebraska-Lincoln ArticleLocal News ArticleUniversity of Nebraska-Lincoln Video2024 Safety Summit Poster: W-Beam Guardrail2024 Safety Summit Poster: Roadside Barriers

New Jersey’s Systemic Approach to Safety

New Jersey
NJDOT's Systemic Approach to Safety focuses on proactively addressing crash risk by widely implementing low-cost, proven effective countermeasures throughout a roadway network. The systemic approach considers elements not typically identified through traditional approaches.
2024 Safety Summit Poster

The Safe System Approach in New Jersey

New Jersey
NJDOT has integrated the six principles and five elements of the Safe System Approach (SSA) into its programs, practices, and projects, aiming to achieve zero fatalities and serious injuries on all public roads.
Presentation Slides2024 Safety Summit Poster

Turning Road Safety Audits into Projects

New Jersey
NJDOT noted a 10-16% reduction in total crashes due to implementations from road safety audits. Over 25 road safety audits RSAs have been conducted on state, county, and municipal roadways under HSIP.
2024 Safety Summit Poster

Using Before and After Tools to Make Data Driven Safety Decisions

New Jersey
As part of the HSIP, NJDOT uses observational before/after analyses with a volume adjustment tool to evaluate countermeasure effectiveness and safety benefits. For example, post-deployment evaluation of centerline rumble strips showed a total crash cost benefit of more than $11 million for all target crashes.
2024 Safety Summit Poster

Wrong-Way Driver Action Plan

New Hampshire
The NHDOT Wrong-Way Driver Action Plan aims to address the increasing threat of wrong-way drivers by identifying risk factors and guiding systemic deployment of countermeasures.
Local News Article2024 Safety Summit Poster
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