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Related Concept Videos

Survey Safety01:28

Survey Safety

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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...
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Design Example: Alignment of a Road Line Using GIS01:17

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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...
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Design Example: Analyzing Capacity Contours for Flood Risk Assessment01:17

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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...
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Profile Leveling and Cross Sections01:26

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Profile leveling and cross-sections are surveying methods used to determine and document terrain elevations for infrastructure projects such as highways, railroads, canals, and pipelines. These methods provide data for earthwork planning and alignment of proposed routes.  Profile leveling involves measuring elevations along a fixed line to create a vertical terrain profile. A surveyor sets up a leveling instrument at the benchmark (BM) and records a backsight (BS) to determine the...
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Vertical Curve: Problem Solving01:23

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Vertical curves provide the transition between two roadway grades, ensuring safety, comfort, and functionality. Calculating elevations at specific stations along the curve involves several systematic steps based on the curve's geometry and provided design parameters.The vertical curve is defined by its length, grades, Point of Vertical Intersection (P.V.I.) location, and P.V.I. elevation. The stations of the Point of Vertical Curvature (P.V.C.), where the curve begins, and the Point of Vertical...
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Updated: May 20, 2025

Trajectory Data Analyses for Pedestrian Space-time Activity Study
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Vehicle collision risk assessment method in highway work zone based on trajectory data.

Wenyun Tang1, Hanbin Wang1, Jianxiao Ma1

  • 1College of Automobile and Traffic Engineering, Nanjing Forestry University, Nanjing, China.

Traffic Injury Prevention
|March 26, 2025
PubMed
Summary

Highway work zone safety is improved by analyzing collision risks. Lane-changing vehicles and specific work zone areas show higher risks, influenced by speed and acceleration differences.

Keywords:
Highway transportationcollision riskhighway work zonetrajectory data

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Area of Science:

  • Transportation Engineering
  • Traffic Safety Analysis
  • Risk Assessment

Background:

  • Highway work zones present unique safety challenges due to altered traffic patterns and infrastructure.
  • Evaluating vehicle safety in these dynamic environments is crucial for preventing accidents.

Purpose of the Study:

  • To assess vehicle safety in highway work zones by analyzing collision risks.
  • To develop a comprehensive risk assessment method for work zones.
  • To identify spatial variations and influencing factors of collision risk.

Main Methods:

  • Utilized Unmanned Aerial Vehicle (UAV) technology to capture vehicle trajectory data.
  • Employed Tracker software for data extraction and traffic flow analysis.
  • Developed a risk assessment model evaluating collision likelihood and severity.

Main Results:

  • Lane-changing vehicles exhibited higher collision risks (0.3-0.5) compared to straight-moving vehicles (0.2-0.4).
  • Collision risk progressively increased from warning (0.155) to transition (0.207) and buffer areas (0.252).
  • Acceleration difference (0.698) and speed difference (0.305) showed significant positive correlations with collision risk.

Conclusions:

  • The study quantifies collision risks in work zones, highlighting areas and behaviors with elevated danger.
  • Findings provide a scientific basis for targeted safety improvements and enhanced traffic management in highway work zones.
  • The methodology offers valuable technical support for decision-making in work zone safety.