Related Experiment Video
Updated: Jul 17, 2025
11:41
Evaluation of an Exclusive Spur Dike U-Turn Design with Radar-Collected Data and Simulation
Published on: February 1, 2020
20.4K
A framework for proactive safety evaluation of intersection using surrogate safety measures and non-compliance
Deep Patel1, Parisa Hosseini1, Mohammad Jalayer2
1Department of Civil and Environmental Engineering, Rowan University, United States.
Accident; Analysis and Prevention
|September 6, 2023
Summary
This study introduces an AI video analysis tool to assess intersection safety by tracking road user behavior and conflicts. It identifies risky actions and estimates crash likelihood, aiding traffic safety improvements.
Area of Science:
- Traffic Engineering
- Artificial Intelligence
- Computer Vision
Background:
- Intersections are critical safety zones, with over 50% of fatal crashes occurring there.
- Understanding road user behavior and conflicts is vital for enhancing traffic safety.
- Existing methods for intersection safety analysis require advanced tools for comprehensive data collection.
Purpose of the Study:
- To develop an AI-powered video analytic tool for assessing intersection safety.
- To utilize surrogate safety measures and identify non-compliance behaviors.
- To estimate potential crash frequency and rank intersections based on safety.
Main Methods:
- Deployed YOLO-v5 and DeepSORT for real-time trajectory detection and tracking.
- Collected 54 hours of video data from six signalized intersections in Glassboro, NJ.
- Applied Extreme Value Theory (EVT) to estimate crash numbers using surrogate safety measures like PET and TTC.
Main Results:
- Achieved 92%-98% accuracy in detecting and tracking road user trajectories.
- Quantified traffic and pedestrian volumes, red-light running, and pedestrian non-compliance.
- Provided critical safety measures (PET, TTC) and ranked intersections by crash severity score.
Conclusions:
- The AI tool effectively assesses intersection safety and identifies risky behaviors.
- Crash estimation using EVT and surrogate safety measures offers valuable insights for traffic engineers.
- The developed ranking system aids in prioritizing safety interventions at high-risk intersections.
Related Concept Videos
01:28Survey Safety
51
Surveying near highways, rough terrain, or power lines involves significant risks. Working along highways is particularly dangerous and requires the use of warning signs and flagmen. It is safest to avoid working directly on roads and use offsets whenever possible. When highway work is unavoidable, it must follow all safety guidelines. Surveyors should wear bright clothing, such as orange reflective vests, to ensure visibility to motorists, coworkers, and hunters. In construction zones, wearing...
51
01:41Social Traps
22.4K
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...
22.4K
01:42Schemas
11.7K
A schema is a mental construct consisting of a cluster or collection of related concepts (Bartlett, 1932). There are many different types of schemata, and they all have one thing in common: schemata are a method of organizing information that allows the brain to work more efficiently. When a schema is activated, the brain makes immediate assumptions about the person or object being observed.
11.7K
01:16Response Surface Methodology
176
Response Surface Methodology (RSM) is a collection of statistical and mathematical techniques used to develop, improve, and optimize processes. It is particularly valuable when many input variables or factors potentially influence a response variable.
The process of RSM involves several key steps:
The process of RSM involves several key steps:
176
01:25Strategies for Assessing and Addressing Confounding
119
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...
Confounding can be addressed at both the design phase of a study and through analytical methods after data...
119
01:10Pre-Procedural Guidelines for Assessing Blood Pressure
595
Accurate blood pressure assessment is crucial for diagnosing and managing various health conditions. To ensure the reliability of these measurements, healthcare professionals must adhere to standardized pre-procedural guidelines. These guidelines enhance patient safety and improve the overall quality of healthcare. The following steps are essential for obtaining accurate and consistent blood pressure readings, from using the appropriate tools to ensuring effective communication with the...
595