Related Experiment Video
Updated: Feb 10, 2026
14:57
Structural Design and Manufacturing of a Cruiser Class Solar Vehicle
Published on: January 30, 2019
14.4K
Key risk indicators for accident assessment conditioned on pre-crash vehicle trajectory
1School of Civil & Environmental Engineering, Nanyang Technological University, 639798, Singapore.
Accident; Analysis and Prevention
|May 18, 2018
Summary
A new Key Risk Indicator (KRI) framework uses hybrid metrics to assess pre-accident risks. This approach effectively predicts accident severity and identifies at-risk vehicles, locations, and times.
Area of Science:
- Road safety
- Traffic accident analysis
- Predictive modeling
Background:
- Accidents are rare and unexpected, necessitating proactive risk assessment.
- Surrogate indicators can identify risk levels and improve accident prediction.
- Existing methods may not fully capture complex pre-accident risk dynamics.
Purpose of the Study:
- To propose and develop a Key Risk Indicator (KRI) framework for pre-accident risk assessment.
- To evaluate the effectiveness of hybrid indicators in assessing risk exposures.
- To provide predictive insights for accident prevention.
Main Methods:
- Developed a Key Risk Indicator (KRI) framework using seven hybrid metrics.
- Employed a grid remapping method for data extraction from surveillance footage.
- Utilized a temporal-spatial case-control design to evaluate indicator feasibility.
- Compared Time Integrated Time-to-collision (TIT) and Crash Potential Index (CPI) for risk assessment.
Main Results:
- Time Integrated Time-to-collision (TIT) effectively identifies pre-accident risk conditions.
- Crash Potential Index (CPI) excels at pinpointing near-accident scenarios.
- The developed KRI framework provides three levels of risk severity and likelihood.
- KRI analysis successfully predicted at-risk vehicles, locations, and times.
Conclusions:
- Hierarchical indicators like KRIs offer novel insights into pre-accident risk exposures.
- The KRI framework demonstrates strong potential for enhancing accident assessment and prediction.
- Flexible threshold definitions in KRIs simplify practical application without critical impact.
More Related Videos
19:15Assessment and Evaluation of the High Risk Neonate: The NICU Network Neurobehavioral Scale
Published on: August 25, 2014
88.0K
09:18Laser-heating and Radiance Spectrometry for the Study of Nuclear Materials in Conditions Simulating a Nuclear Power Plant Accident
Published on: December 14, 2017
11.0K
Related Concept Videos
02:39Indicators
61.1K
Certain organic substances change color in dilute solution when the hydronium ion concentration reaches a particular value. For example, phenolphthalein is a colorless substance in any aqueous solution with a hydronium ion concentration greater than 5.0 × 10−9 M (pH < 8.3). In more basic solutions where the hydronium ion concentration is less than 5.0 × 10−9 M (pH > 8.3), it is red or pink. Substances such as phenolphthalein, which can be used to determine the pH of a solution, are...
61.1K
01:19Respiratory Assessment: Purpose and Indications
1.8K
Respiratory assessment is a cornerstone of nursing assessments, crucial for the early detection of patient deterioration. This evaluation transcends routine procedures, representing a critical skill nurses must master to ensure optimal patient care.
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...
Objectives and Importance:
The primary goal of respiratory assessment is to evaluate patients at early risk of clinical deterioration. Since respiratory distress often precedes other signs of declining health, breathing patterns and sounds become a...
1.8K
01:26Orthogonal Trajectories
71
Orthogonal trajectories describe the geometric relationship between two families of curves that intersect each other at right angles. One illustrative case involves a family of parabolas that open sideways along the x-axis. These curves share a common shape but differ by a scaling parameter, resulting in a set of curves that all pass through the origin and widen at different rates.Determining Orthogonal TrajectoriesTo identify the orthogonal trajectories for these parabolas, the first step...
71
01:10Pre-Procedural Guidelines for Assessing Blood Pressure
889
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...
889
01:17Design Example: Analyzing Capacity Contours for Flood Risk Assessment
328
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...
328
01:19Key Techniques in Microbiology
2.5K
Aseptic techniques prevent contamination, ensure experimental accuracy, and protect researchers and microbial cultures. These techniques are essential in clinical, industrial, and research settings where sterility is required.Maintaining Sterility in Laboratory PracticesScientists maintain sterility by sterilizing tools with heat or chemicals, disinfecting work surfaces, and handling cultures in controlled environments. Working near an open flame or within a laminar flow hood reduces the risk...
2.5K