RoadSafe LLC

05/22/2023

10/20/2022

Check out this cable barrier!

Safety around school buses is nothing new. This is National School Bus Safety Week, so here’s your reminder that it’s illegal to pass a stopped school bus.

10/04/2022

The National Academies of Science, Engineering and Medicine (NASEM) recently published NCHRP Report 1010, "In-Service Performance Evaluation: Guidelines for the Assembly and Analysis of Data." https://lnkd.in/eqrMt2ej

The evolution of roadside hardware in the past has been largely dictated by changes to crash testing guidance rather than observed field performance. While there may be no question that the updated hardware preforms better under the crash testing specifications, it is unclear how many fewer fatal or serious injuries might result from deploying the improved hardware.

The objective of this research was to develop a unified format and nationally compatible ISPE methodology employing various individual state database parameters. The ISPE methodology developed under this research capitalizes on data that is often already available in a typical Transportation Agency and minimizes new data collection to situations where it is beneficial.

RoadSafe LLC conducted this research under NCHRP Project 22-33.

Download a PDF of "In-Service Performance Evaluation: Guidelines for the Assembly and Analysis of Data" by the National Academies of Sciences, Engineering, and Medicine for free.

08/11/2022

The National Academies of Science, Engineering and Medicine (NASEM) recently published NCHRP Report 996, "Selection and Placement Guidelines for Test Level 2 Through Test Level 5 Median Barriers" -- https://nap.nationalacademies.org/catalog/26679/selection-and-placement-guidelines-for-test-level-2-through-test-level-5-median-barriers. RoadSafe LLC conducted this research under NCHRP Project 22-31.

The variety of median widths and terrains combined with evolving testing specifications and lack of conclusive data on median crossover crashes have been obstacles to developing median barrier guidance. This project capitalized on new data and analysis methodologies to developed proposed guidelines for the selection and placement of Manual for Assessing Safety Hardware (MASH) Test Levels 2 through 5 (TL2-TL5) median barriers. During the course of the research, the project was extended to include the guidance for roadside (i.e., single face) barrier as well.

05/03/2022

The National Academies of Science, Engineering and Medicine (NASEM) recently published NCHRP Web-Only Document 325, "Consideration of Roadside Features in the Highway Safety Manual" -- https://lnkd.in/gwr7HYbb . This report was the product of NCHRP 17-54 which Roadsafe LLC completed in 2019.

This report describes the background of predicting roadside crashes, our research approach, the resulting run-off-road (ROR) crash predictive methods, and presents a draft chapter for consideration by AASHTO for publication in the Highway Safety Manual.

Download a PDF of "Consideration of Roadside Features in the Highway Safety Manual" by the National Academies of Sciences, Engineering, and Medicine for free.

04/28/2022

03/15/2022

The National Academies of Science, Engineering and Medicine (NASEM) recently published NCHRP Web-Only Document 319, "Roadside Safety Analysis Program (RSAP) Update" -- https://www.nap.edu/catalog/26521/roadside-safety-analysis-program-rsap-update . This report was the product of NCHRP 22-27 which Roadsafe LLC completed in 2012. The project also resulted in a new version of the program, RSAPv3.
RSAPv3 can be used to analyze roadside designs and performs both benefit-cost and risk assessment analyses to help engineers select the best roadside alternatives. RSAPv3 addresses fixed object crashes, terrain related rollovers, shielding fixed objects with guardrails, selecting appropriate bridge rails and terminals as well as many other roadside design situations.
The Roadsafe team completely re-wrote the program and made numerous improvements. The program is provided as an Excel macro enabled template so anyone with MS Excel can download and use it. The User's Manual, Engineer's Manual, Programmer's Manual, and the program itself are available at no charge at https://rsap.roadsafellc.com/. Example problems and installation instructions are also available on the Roadsafe RSAPv3 website.
Roadsafe has provided RSAPv3 training to a number of DOTs, utility companies, and consultants since the program first was released in 2012. If your agency or company is interested in learning more about RSAPv3 or hosting training, please contact us.

RSAP is an encroachment-based computer software tool for cost-effectiveness evaluation of roadside safety improvements originally developed under NCHRP Project 22-9(1).  Subsequently, some improvements were made, bugs corrected and patches installed under NCHRP Project 22-9(2).  A third NCHRP proj...

10/22/2021

Some nice new guardrail on a newly reconstructed segment of Maine Rt 140.

10/17/2021

It’s that time of year again, and a beautiful one at that. Check out the current foliage map, and plan your own way to see it at: https://www.exploremaine.org/byways/index.shtml

10/12/2021

November is peak collision month for deer, with cases rising dramatically in October. Keep yourself, and Maine’s wildlife safe. Drive slow. Be alert.

10/04/2021

Fall is here, so look for deer!