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Related Concept Videos

Survey Safety01:28

Survey Safety

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...
Social Traps01:41

Social Traps

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 more cows, the larger...
Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

Sight distance on vertical curves is critical in roadway design. It ensures drivers can see far enough ahead to identify and respond to hazards effectively. This directly impacts safety, driver comfort, and the overall efficiency of the transportation network.Vertical curves are classified into crest and sag curves based on their geometry. For crest curves, sight distance is determined by the line of sight between a driver's eye and a small object on the road's surface. Design parameters for...
Introduction to Vertical Curves01:24

Introduction to Vertical Curves

Vertical curves are parabolic transitions that connect different grades on highways and railroads, ensuring a smooth alignment between back and forward tangents. The back tangent represents the initial grade, while the forward tangent defines the subsequent grade. These curves can be symmetrical, with equal tangent lengths, or nonsymmetrical, with varying lengths. The key points defining a vertical curve include the Point of Vertical Intersection (P.V.I.), where the tangents meet; the Point of...
Vertical Curve: Problem Solving01:23

Vertical Curve: Problem Solving

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

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...

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Related Experiment Video

Updated: Jun 24, 2026

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

Published on: February 1, 2020

Road traffic suicides.

J P Wyatt1, T Squires, S Collis

  • 1Emergency Department, Royal Cornwall Hospital, Treliske, Truro, Cornwall TR1 3LJ, United Kingdom. jonathan.wyatt@rcht.cornwall.nhs.uk

Journal of Forensic and Legal Medicine
|March 31, 2009
PubMed
Summary
This summary is machine-generated.

Suicide by road traffic collision is an underrecognized cause of death, accounting for 2.8% of fatalities in a Scottish study. These difficult-to-prevent incidents often involve severe injuries and a history of mental illness.

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

  • Forensic Pathology
  • Public Health
  • Traffic Safety

Background:

  • Road traffic collisions (RTCs) are a significant cause of mortality.
  • Determining intent in fatal RTCs can be challenging.
  • Previous research has not fully quantified suicide as a cause of RTC fatalities.

Purpose of the Study:

  • To investigate the incidence and characteristics of suicide in fatal road traffic collisions.
  • To assess the role of mental health history and injury patterns in these cases.

Main Methods:

  • Prospective observational study of fatal RTCs in south-east Scotland (1993-2003).
  • Analysis of 17 cases identified as potential suicides based on injury mechanism and background information.
  • Review of medical history and injury severity (Abbreviated Injury Scale, Injury Severity Score).

Main Results:

  • 17 cases (2.8% of all road fatalities) were identified as likely suicides.
  • Victims included 13 car drivers and 4 pedestrians.
  • 10 individuals had a history of mental illness; only 3 survived to reach hospital.
  • 9 individuals sustained unsurvivable injuries (AIS=6 or ISS=75).

Conclusions:

  • Suicide in fatal RTCs may be generally underestimated.
  • These events present unique challenges for prevention.
  • A combination of injury patterns and background factors is crucial for identifying suicide in RTCs.