Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Manipulation and Analysis01:21

Manipulation and Analysis

58
GIS manipulation and analysis functions are vital for decision-making and planning. These activities range from data retrieval tasks, such as selecting information based on specific criteria, to advanced analytical techniques that address complex spatial problems.One critical GIS analysis method is overlaying, which combines multiple data layers to examine impacts. For example, overlaying a river-dammed lake boundary with road networks can identify affected infrastructure. Another common...
58
Strategies for Assessing and Addressing Confounding01:25

Strategies for Assessing and Addressing Confounding

153
Confounding is a critical issue in epidemiological studies, often leading to misleading conclusions about associations between exposures and outcomes. It occurs when the relationship between the exposure and the outcome is mixed with the effects of other factors that influence the outcome. Given that, addressing confounding is of high importance for drawing accurate inferences in research.
Confounding can be addressed at both the design phase of a study and through analytical methods after data...
153
Social Traps01:41

Social Traps

23.2K
Social traps are negative situations where people get caught in a direction or relationship that later proves to be unpleasant, with no easy way to back out of or avoid. The concept was orignally introduced by John Platt who applied psychology to Garrett Hardin's "Tragedy of the Commons", where in New England herd owners could let their cattle graze in the common ground. This situation seems like a good idea, but an individual could have an advantage. If they owned...
23.2K
Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

103
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...
103
Mesh Analysis01:20

Mesh Analysis

922
Mesh analysis is a valuable method for simplifying circuit analysis using mesh currents as key circuit variables. Unlike nodal analysis, which focuses on determining unknown voltages, mesh analysis applies Kirchhoff's voltage law (KVL) to find unknown currents within a circuit. This method is particularly convenient in reducing the number of simultaneous equations that need to be solved.
A fundamental concept in mesh analysis is the definition of meshes and mesh currents. A mesh is a closed...
922
Stress Concentrations01:24

Stress Concentrations

373
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...
373

You might also read

Related Articles

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

Sort by
Same author

Revisiting Biomarker-Guided Therapy in EGFR-Mutant Non-Small Cell Lung Cancer with High PD-L1 Expression.

International journal of molecular sciences·2026
Same author

Comparative safety evaluation of ADAS-Equipped electric and gasoline vehicles using real-world crash data.

Accident; analysis and prevention·2026
Same author

Blood Based Biomarkers for Predicting Treatment Response to Immune Checkpoint Inhibitors After EGFR-TKI Resistance in Non-Small Cell Lung Cancer.

Thoracic cancer·2026
Same author

When does visual distraction become dangerous in car-following? Evidence from naturalistic driving study data with causal inference on time-to-collision and braking intensity.

Accident; analysis and prevention·2026
Same author

Determinants influencing risks in e-bike cyclists under mix traffic condition: a partially constrained random parameters approach using experimental study data.

Accident; analysis and prevention·2025
Same author

Segment level safety analysis using lane-changing behavior and driving volatility features from connected vehicle trajectories.

Scientific reports·2025
Same journal

Modeling road-segment-level speeding risk of new energy vehicle taxis using a multistage framework with spatial spillover, endogeneity, and nonlinear effects.

Accident; analysis and prevention·2026
Same journal

Role of streetscape feature in pedestrian safety: A modified multi-level multiple membership model.

Accident; analysis and prevention·2026
Same journal

Assessing autonomous driving performance and environmental influencing factors using real-world operational trajectory data.

Accident; analysis and prevention·2026
Same journal

Multi-scale modeling of electric vehicle fatal crash risk: uncovering spatial heterogeneity and infrastructure-land use coupling mechanisms.

Accident; analysis and prevention·2026
Same journal

Differential sensitivity of self-reported driving and collision measures to aspects of shiftwork, sleep, and fatigue.

Accident; analysis and prevention·2026
Same journal

Delving into the visual attention of pedestrians during street crossing under time pressure: An eye-tracking approach.

Accident; analysis and prevention·2026
See all related articles

Related Experiment Video

Updated: Sep 8, 2025

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

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

Published on: February 1, 2020

20.5K

Micro-level hotspot identification at intersections using traffic conflict analysis.

Nuri Park1, Juneyoung Park2, Yang-Jun Joo3

  • 1Department of Smart City Engineering, Hanyang University, Ansan 15588, South Korea.

Accident; Analysis and Prevention
|July 11, 2025
PubMed
Summary
This summary is machine-generated.

This study precisely identifies micro-level traffic crash hotspots within intersections using drone data and traffic conflict measures like time-to-collision (TTC) and post-encroachment time (PET). Findings reveal specific conflict patterns linked to crash types, enabling targeted safety interventions.

Keywords:
Crash risk hotspotSignalized intersectionTraffic conflict measuresTraffic safety

More Related Videos

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
14:55

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street

Published on: January 20, 2023

3.4K
Using a Virtual Reality Walking Simulator to Investigate Pedestrian Behavior
06:38

Using a Virtual Reality Walking Simulator to Investigate Pedestrian Behavior

Published on: June 9, 2020

4.9K

Related Experiment Videos

Last Updated: Sep 8, 2025

Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
11:41

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

Published on: February 1, 2020

20.5K
Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street
14:55

Evaluating the Effect of Roadside Parking on a Dual-Direction Urban Street

Published on: January 20, 2023

3.4K
Using a Virtual Reality Walking Simulator to Investigate Pedestrian Behavior
06:38

Using a Virtual Reality Walking Simulator to Investigate Pedestrian Behavior

Published on: June 9, 2020

4.9K

Area of Science:

  • Transportation Engineering
  • Traffic Safety Analysis
  • Urban Planning

Background:

  • Traditional traffic crash hotspot identification often overlooks intra-intersection risk variations.
  • Micro-level analysis offers precise identification of high-risk areas within intersections.

Purpose of the Study:

  • To identify micro-level crash hotspots in signalized intersections using drone-derived traffic conflict measures.
  • To develop and validate models for selecting optimal conflict measures and thresholds for hotspot detection.

Main Methods:

  • Utilized drone video to capture traffic data and calculate conflict measures: time-to-collision (TTC), modified time-to-collision (MTTC), and post-encroachment time (PET).
  • Developed generalized linear models (GLM) to select appropriate conflict measures and thresholds.
  • Applied kernel density estimation to detect micro-level hotspots based on selected conflict measures.

Main Results:

  • Time-to-collision (TTC) and post-encroachment time (PET) showed strong correlations with micro-level crash frequencies.
  • TTC-based conflicts were linked to rear-end crashes before the stop line.
  • PET-based conflicts were associated with intersection crashes, especially those involving left-turning vehicles.

Conclusions:

  • Identified specific traffic conflict measures (TTC, PET) indicative of micro-level crash hotspots.
  • Demonstrated the effectiveness of drone-based analysis for detailed intersection safety assessment.
  • Provided evidence-based recommendations for targeted safety interventions like pavement markings and signal timing adjustments.