Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Design Example: Alignment of a Road Line Using GIS

Design Example: Alignment of a Road Line Using GIS

The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...

Design Consideration

Design Consideration

Designing a structure involves a series of considerations, primarily the material's ultimate strength, calculated through tests that measure changes under increased force until the material reaches its breaking point or limit. The ultimate load, where the material breaks, is divided by its original cross-sectional area, resulting in the ultimate normal stress or strength. The ultimate shearing stress is another significant factor taken into account.
The factor of safety is another key...

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

Design Example: Analyzing Capacity Contours for Flood Risk Assessment

Flood risk assessment involves careful planning and analysis to ensure the safety of communities near water retention structures. Capacity contours are a vital tool in this process, as they illustrate the potential spread of water at specific levels in a given area. In the context of building a bund across a small valley, these contours play a critical role in evaluating the safety of nearby residential areas.In this example, the bund is intended to store stormwater in the valley. The engineers...

Stress Concentrations

Stress Concentrations

Stress concentration is when stress intensifies near discontinuities such as holes or abrupt cross-sectional changes in a structural member. This localized stress can often surpass the average stress within the member. The stress distribution in flat bars, either with a circular hole or varying widths connected by fillets, can be determined experimentally using a photoelastic method. The results are based on ratios of geometric parameters like the ratio of the hole's radius to the smaller...

Stress Concentrations

Stress Concentrations

The concept of stress concentration is crucial for understanding how materials respond under bending stresses, particularly when there are irregularities or discontinuities in the material's geometry. Normally, stress in a symmetric member subjected to pure bending is assumed to be uniformly distributed across the entire cross-section. However, this assumption does not hold when there are variations in the cross-sectional geometry or the presence of notches and holes.
The stress...

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Out-of-sample prediction and interpretation for random parameter generalized linear models.

Accident; analysis and prevention·2025

Same author

Causal inference framework for generalizable safety effect estimates.

Accident; analysis and prevention·2017

Same author

A method to account for and estimate underreporting in crash frequency research.

Accident; analysis and prevention·2016

Same author

Estimating the safety effects of lane widths on urban streets in Nebraska using the propensity scores-potential outcomes framework.

Accident; analysis and prevention·2015

Same author

Comparison of safety effect estimates obtained from empirical Bayes before-after study, propensity scores-potential outcomes framework, and regression model with cross-sectional data.

Accident; analysis and prevention·2014

Same author

Using naturalistic driving data to explore the association between traffic safety-related events and crash risk at driver level.

Accident; analysis and prevention·2014

Search research articles

Related Experiment Video

Updated: Feb 27, 2026

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

Using network screening methods to determine locations with specific safety issues: A design consistency case study.

Andrew J Butsick¹, Jonathan S Wood², Paul P Jovanis³

¹Kittelson & Associates, Inc., 610 SWAlder St, Suite 700, Portland, OR 97205, United States.

Accident; Analysis and Prevention

|June 24, 2017

Summary

This study introduces a new method to identify road sites needing safety improvements, specifically targeting geometric design issues. This approach helps prioritize infrastructure funding for roads with specific safety problems.

Keywords:

Alignment index Blackspot identification Design consistency Empirical Bayes Safety diagnostics

More Related Videos

Design and Analysis for Fall Detection System Simplification

Design and Analysis for Fall Detection System Simplification

Published on: April 6, 2020

Efficient Sampling of Genetically Encoded Biosensor Design Space Enabled with a Design of Experiments and Automation Workflow

Efficient Sampling of Genetically Encoded Biosensor Design Space Enabled with a Design of Experiments and Automation Workflow

Published on: October 17, 2025

Related Experiment Videos

Last Updated: Feb 27, 2026

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation

Published on: February 1, 2020

Design and Analysis for Fall Detection System Simplification

Design and Analysis for Fall Detection System Simplification

Published on: April 6, 2020

Efficient Sampling of Genetically Encoded Biosensor Design Space Enabled with a Design of Experiments and Automation Workflow

Efficient Sampling of Genetically Encoded Biosensor Design Space Enabled with a Design of Experiments and Automation Workflow

Published on: October 17, 2025

Area of Science:

Transportation Engineering
Road Safety Analysis
Highway Design

Background:

Existing methods for identifying sites with promise (SWiPs) for safety improvements often lack specificity.
Infrastructure funding is frequently allocated for specific safety programs or identified problems.
A method to identify SWiPs linked to particular issues is needed for efficient resource allocation.

Purpose of the Study:

To develop and validate a novel method for identifying sites with promise (SWiPs) that are associated with specific safety concerns.
To apply this method to pinpoint SWiPs related to geometric design consistency issues on two-lane rural roadways.

Main Methods:

Utilized mixed-effects negative binomial regression to develop two safety performance functions (SPFs).
SPFs were created using five years of crash data from over 8754 km of two-lane rural roads.
One SPF included standard roadway elements, while the second incorporated geometric design consistency parameters.

Main Results:

The developed method successfully identified SWiPs related to geometric design consistency.
A notable disparity was observed between the SWiPs identified by the two SPFs, with 40 unique sites each among the top 220 segments.
Comparing sites across both models highlighted segments where design inconsistency may increase crash risk.

Conclusions:

The proposed method enables practitioners to effectively identify roadway segments with safety performance issues stemming from geometric design inconsistency.
This targeted approach facilitates more efficient identification of problem areas for safety improvements.
Further detailed engineering studies are recommended to confirm the initial assessments of identified road segments.