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Crash Tree Diagrams

AASHTOWare Safety 2023 Preview – Crash Tree Diagrams

Did you know that AASHTOWare Safety, powered by Numetric, will soon support creating Crash
Tree Diagrams to identify and visualize focus crash types, facility types, and risk factors.

Product Steering Guidance From AASHTOWare Safety User Experience Advisory
Committee Meeting

As a result of our recent AASHTOWare Safety User Experience Advisory Committee meeting
last May, AASHTOWare Safety team has targeted the release of our Crash Tree Diagrams
application for the Winter of 2023.


Crash Tree Diagrams in Action
With the addition of Crash Tree Diagrams, AASHTOWare Safety users can easily identify where
crashes occur, what kind of roadway attributes correlate with crashes, or what kind of behavioral
elements correlate with crashes. With this information, a city, county, or state, can make
informed decisions regarding potential safety improvements on their roadways.

AASHTOWare Safety

(A Crash Tree Diagram displaying crash trends along state-owned, urban, intersections.)

To learn more about how AASHTOWare Safety can help your agency utilize safety and roadway data to make better-informed safety decisions, email Ryan Fragapane (rfragapane@aashto.org), Project Manager for AASHTOWare.

Interested in learning more? Contact us below

AASHTOWare Safety Assuring Project Equity Throughout the Roadway Safety Management Process

Did you know that AASHTOWare Safety, powered by Numetric, can help your agency ensure that your selected safety projects represent all social equity groups in your communities?

AASHTOWare Safety can help agencies evaluate which social equity groups are going to be impacted by selected safety projects across your communities. By including social equity measures, such as Social Vulnerability Index, in every step of the Roadway Safety Management Process, your agency can be sure that your selected projects positively impact everyone in your community. Whether you are simply validating the equity impact of your projects during Project Prioritization or ensuring that all roadway users are represented in your Network Screenings, AASHTOWare Safety can help make this process simple and impactful for you and the citizens in your community.

(A screenshot from the Crash Query application displaying a Pedestrian Safety analysis in a given county, evaluating routes, and overall social vulnerability)

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AASHTOWare Safety Helping Agencies With Social Equity

Did you know that AASHTOWare Safety, powered by Numetric, can help your agency account for Social Equity in safety projects? 

AASHTOWare Safety can help agencies evaluate projects based on key social equity metrics, ensuring equitable distribution of safety funds and prioritization of safety projects across your communities. Whether you want to utilize your agency’s existing social equity metrics or draw on the existing CDC/ATSDR Social Vulnerability Index, AASHTOWare Safety can easily incorporate these key metrics into your crash and safety data. Once incorporated, you can begin conducting crash data analyses, safety project evaluations, and even network screenings, all based on your key social equity metrics.

Social Equity
(A screenshot from the Network Screening – Sliding Window Analysis application displaying a network screening analysis on areas with a Social Vulnerability Index (SVI) below .85)

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Use AASHTOWare Safety to Conduct Predicted and Expected Network Screenings

Did you know that AASHTOWare Safety, powered by Numetric can help your agency run on-demand network screenings using Predicted and Expected performance measures?

AASHTOWare Safety can help your agencies identify areas of interest using advanced empirical Bayes Expected network screening rankings. When combined with our Predictive Analysis module, which can help generate state-specific SPFs, any agency is capable of conducting in-depth network screenings with expected performance measures, such as:

  • Expected Crashes
  • Expected Crash Rate
  • Expected Crashes Per Mile
  • Potential for Safety Improvement (Expected – Predicted)
  • LOSS
Conduct Predicted

Interested in learning more? Contact us below

AASHTOWare Safety Network Screening – Third-Party Validation

n preparation for the sunsetting of Safety Analyst in July 2022, AASHTOWare Safety has recently completed a third-party validation of all AASHTOWare Safety Network Screening  calculations and methodologies to ensure adherence to HSM recommendations and best practices.

The Texas A&M Transportation Institute (TTI) recently published its report, “Validation of the AASHTOWare Safety powered by Numetric Network Screening Calculations which validates several key areas within AASHTOWare Safety, including:

  • Performance Measures | During the validation process, the 12 Performance Measures available in AASHTOWare Safety were found to be in alignment with the calculations previously generated by Safety Analysis, and the Highway Safety Manual (HSM).

“Based on the validation test procedures, it was confirmed that the Beta version of the Numetric software used for this validation testing properly and accurately calculates network screening performance measures for rural two-lane, two-way roads in accordance with procedures described in the HSM.”

– TTI Validation Report

  • Predictive and Expected Methods | The report also validates the ability to implement SPFs, and generate accurate Empirical Bayes expected performance measures, allowing for the use of Historical, Presided, and Expected Performance Measures throughout the AASTHOWare Safety platform.

“In particular, the Numetric software properly implements SPFs to accurately calculate predicted crash frequencies and rates and Empirical Bayes (EB) methods which combine observed and predicted crashes to accurately calculate expected crash frequencies and rates. Based on these foundational procedures, a range of performance measures based on predictive and EB methods are accurately calculated and available for network screening in the Numetric software for rural two-lane, two-way roads.”

– TTI Validation Report

Interested in learning more? Contact us below

Safety Analyst

AASHTOWare Safety Replacing Safety Analyst

With the sunsetting of Safety Analyst in July 2022, now is the perfect time to familiarize yourself with AASHTOWare Safety powered by Numetric. 

AASHTOWare Safety builds on key features and processes of Safety Analyst and offers several key advantages:

  • Web-based Platform | AASHTOWare Safety is an entirely web-based platform. This means you no longer need to install any local applications or software. Any computer with access to the internet and an up-to-date web browser can access AASTHOWare Safety.
  • Rapid Implementation | Most agencies can demo a fully-functional test drive with a limited set of their own data in just 2-3 weeks. For production rollout, agencies are typically trained and utilizing AASHTOWare Safety in their roadway safety management processes just 4-5 months after the project start date. 
  • Data Adaptability | AASHTOWare Safety works with your existing crash and roadway data. As your data evolves,  AASTHOWare Safety can adapt to new formats and new vendors to ensure you always get the most value of any data you have.

Ongoing Support Partnership | A dedicated customer success team is assigned to your agency throughout the entire lifetime of your partnership with AASTHOWare Safety. This resource is always available and will help guide you through the implementation process, application go-live, and ongoing user training. The AASHTOWare Safety support team will be there every step of the way.

Interested in learning more? Contact us below

Effectively Allocate Increased Federal Safety Dollars with AASHTOWare Safety

Did you know that AASHTOWare Safety, powered by Numetric can help your agency better allocate increased federal safety dollars, ensuring the greatest impact on safety for your community?

With the renewed urgency on increasing the emphasis on Safety, AASTHOWare Safety can help your agency follow HSM best practices in allocating safety funds. By following the six-step Roadway Safety Management Process, AASHTOWare Safety helps you determine where safety funds should be allocated, diagnose and select countermeasures, and easily conduct economic appraisals and safety effectiveness evaluations, allowing you to focus on safety with every project.

Whether you are evaluating existing infrastructure improvements to identify additional safety improvements or selecting new safety projects, AASTHOWare Safety can help with every step in the process.

allocate increased federal safety dollars

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How Utah Uses Big Data to Make Highways Safer

Using new data collection and analysis tools, traffic safety engineers can improve highway design.

Drivers along Interstate 80 in Northern Utah have an added layer of protection against out-of-control autos. Several years ago, a cable-barrier was erected in the median between the two directions of highway.

For that barrier, they can thank big data.

“Even though in many parts of [I-80] we have a very wide median, we found there was a need for additional shoulder protection, because of the types of crashes we were still having, explained” Robert Miles, director of traffic and safety at the Utah Department of Transportation.

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Could This Software Reduce Crashes on Jersey Highways?

Law enforcement and transportation safety experts are utilizing a new tool to better understand what causes accidents so they can help prevent them in the future.

The Rutgers University Center for Advanced Infrastructure and Transportation is using software called Numetric to better analyze crash data in a more holistic way. The information is shared with the state Department of Transportation, local police departments and nonprofit pedestrian and bicycle safety groups.

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