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

Sight Distance in a Vertical Curve01:29

Sight Distance in a Vertical Curve

556
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...
556
Dynamics Of Circular Motion: Applications01:17

Dynamics Of Circular Motion: Applications

7.7K
Suppose a car moves on flat ground and turns to the left. The centripetal force causing the car to turn in a circular path is due to friction between the tires and the road. For this, a minimum coefficient of friction is needed, or the car will move in a larger-radius curve and leave the roadway. Let's now consider banked curves, where the slope of the road helps in negotiating the curve. The greater the angle of the curve, the faster one can take the curve. It is common for race tracks for...
7.7K
Introduction to Horizontal Curves01:19

Introduction to Horizontal Curves

1.3K
Horizontal curves are essential in highway and railroad design, ensuring smooth and safe transitions between straight path segments, or tangents. These curves allow vehicles to maintain speed without abrupt changes, minimizing accidents and improving travel efficiency.A horizontal curve is typically defined by its geometric relationship to two tangents that meet at an intersection point (P.I.), where a simple curve is introduced to connect them. The back tangent refers to the initial tangent...
1.3K
Design Example: Joints in Concrete Pavements01:28

Design Example: Joints in Concrete Pavements

772
Concrete pavement joints are essential for maintaining the structural integrity and longevity of pavement by controlling where and how the pavement cracks. These joints can be categorized based on their functions, such as contraction or control joints, construction joints, isolation joints, and expansion joints.
Contraction joints are typically formed by sawing a groove into the concrete shortly after it has hardened. This creates a weakened vertical plane, deliberately encouraging cracking at...
772
Introduction to Vertical Curves01:24

Introduction to Vertical Curves

875
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...
875
Types of Collisions - II01:19

Types of Collisions - II

7.9K
When two or more objects collide with each other, they can stick together to form one single composite object (after collision). The total mass of the object after the collision is the sum of the masses of the original objects, and it moves with a velocity dictated by the conservation of momentum. Although the system's total momentum remains constant, the kinetic energy decreases, and thus such a collision is an inelastic collision. Most of the collisions between objects in daily life are...
7.9K

You might also read

Related Articles

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

Sort by
Same author

Assessment of self-reported driving ability in patients with bilateral vestibulopathy: Using generic and disease-specific questionnaires.

European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·2026
Same author

The effectiveness of real-time and post-trip interventions within the i-DREAMS naturalistic driving project: A cross-national analysis.

Accident; analysis and prevention·2025
Same author

Development of a framework for risky driving scenario identification, individual risk assessment, and group risk differences estimation using naturalistic driving data from the i-DREAMS project.

Accident; analysis and prevention·2025
Same author

Examination of the Effect of Task Complexity and Coping Capacity on Driving Risk: A Cross-Country and Transportation Mode Comparative Study.

Sensors (Basel, Switzerland)·2023
Same author

Real-time monitoring of driver distraction: State-of-the-art and future insights.

Accident; analysis and prevention·2023
Same author

Driver distraction and in-vehicle interventions: A driving simulator study on visual attention and driving performance.

Accident; analysis and prevention·2023

Related Experiment Video

Updated: Apr 28, 2026

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

18.1K

Identifying crash patterns on roundabouts.

Evelien Polders1, Stijn Daniels, Winfried Casters

  • 1a Transportation Research Institute (IMOB) , Hasselt University , Diepenbeek , Belgium.

Traffic Injury Prevention
|June 3, 2014
PubMed
Summary
This summary is machine-generated.

Roundabout safety is improved by identifying crash types and locations. Vulnerable road users like cyclists face higher risks, particularly in collisions with central islands and on entry lanes.

Keywords:
collision diagramcrashdesignroundabout

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

3.7K
Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
11:12

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects

Published on: September 18, 2012

20.3K

Related Experiment Videos

Last Updated: Apr 28, 2026

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

18.1K
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

3.7K
Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects
11:12

Driving Simulation in the Clinic: Testing Visual Exploratory Behavior in Daily Life Activities in Patients with Visual Field Defects

Published on: September 18, 2012

20.3K

Area of Science:

  • Traffic Safety Engineering
  • Transportation Research
  • Road Safety Audits

Background:

  • Roundabouts are recognized for enhancing traffic safety, significantly reducing severe injury crashes compared to traditional intersections.
  • Despite safety benefits, crashes still occur at roundabouts, necessitating further investigation into their causes and characteristics.

Purpose of the Study:

  • To enhance the understanding of roundabout safety by identifying dominant crash types and their associated locations.
  • To analyze factors contributing to crashes at roundabouts, including road user behavior and intersection design.

Main Methods:

  • Analysis of 399 police-reported crashes across 28 roundabouts in Flanders, Belgium.
  • Detailed examination of crash data and collision diagrams to categorize 8 distinct crash types.
  • Segmentation of roundabouts into 11 typical areas to pinpoint crash locations.

Main Results:

  • Four primary crash types identified: rear-end, vulnerable road user collisions, entering-circulating, and central island impacts.
  • Vulnerable road users (cyclists, moped riders) and central island collisions show higher injury proportions.
  • Approximately 80% of crashes occurred on entry lanes and the circulatory roadway.

Conclusions:

  • Key crash types and their locations at roundabouts have been identified and analyzed.
  • Specific crash types are linked to roundabout design characteristics and crash locations, informing safety improvements.