Occupant Injuries and Roof Strength in Rollover Crashes

2008 ◽  
Author(s):  
Raphael Grzebieta ◽  
David Young ◽  
Andrew McIntosh ◽  
Michael Bambach
Keyword(s):  
Threshold Value ◽  
Lateral Velocity ◽  
The Road ◽  
Centre Of Gravity ◽  
Roof Structure ◽  
The Coefficient Of Friction ◽  
Occupant Injuries ◽  
Roof Strength ◽  
The Moment ◽  
Roof Deformation

This paper shows how a mathematical relationship can be derived linking serious neck injuries to excessive roof deformation and that this relationship depends on the vehicle’s Centre of Gravity (COG) lateral velocity at the moment of touchdown of the vehicle’s roof structure. The relationships have been greatly simplified for an idealized condition to facilitate derivation of the equations. In the case of a very strong roof, occupant neck loading resulting from torso augmentation reaches a threshold value that depends on the coefficient of friction between the road surface and the vehicle’s steel body or tires and the height the vehicle’s COG drops during a quarter turn impact sequence.

scholarly journals FORMS OF x x   s – DIAGRAMS OF AN AUTOMOBILE TYRE

2017 ◽  
Author(s):  
E.V. Balakina
Keyword(s):  
Friction Coefficient ◽  
Coefficient Of Friction ◽  
Lateral Force ◽  
Road Surface ◽  
Vehicle Stability ◽  
The Road ◽  
The Coefficient Of Friction ◽  
Longitudinal Slip ◽  
The Moment ◽  
Friction Interaction

Vehicle stability, handling and braking properties significantly depends on the friction interaction between a tyre and the road surface. Index of the friction interaction is the coefficient of friction in different coordinates. The friction coefficient is generally calculated as a function of the coefficient of the longitudinal slip of the wheel x  f (sx ) . The lateral force significantly affects the coefficient of friction. In different cases the lateral force can occur either before or after occurrence of the braking moment on the wheel. The purpose of the study is to investigate the effect of different sequence of occurrence of the lateral force and the braking moment on a wheel on the friction properties of the tyre with a solid road surface. The author have developed the methods which allows considering the sequence of occurrence of the lateral force and the moment on the wheel in the calculation of x  sx – diagrams.

Road Adhesion Coefficient Estimation Based on the Steering Wheel Rebound After Steering

2018 ◽  
Author(s):  
Liangyao Yu ◽  
Sheng Zheng ◽  
Xiaohui Liu ◽  
Jinghu Chang ◽  
Fei Li
Keyword(s):  
Stability Control ◽  
Front Wheel ◽  
Intelligent Vehicles ◽  
Steering Wheel ◽  
Adhesion Coefficient ◽  
The Road ◽  
Whole Process ◽  
Friction Moment ◽  
Stability Control System ◽  
The Coefficient Of Friction

Accurately estimating road adhesion coefficient is very important for vehicle stability control system. In this paper, an innovation method to estimate the road adhesion coefficient is proposed. This method can be used in vehicles without additional sensors. And this method is especially suitable to be used in the intelligent vehicle equipped with steer-by-wire (SBW) system. When vehicle steers, releasing the steering wheel suddenly will result in rebound to a certain angle. When the steer wheel turns the same angle on different road whose adhesion coefficients are different, the front wheel rebound angles are different. The friction moment between the road and tire is the main factor to prevent the tire from turning back, and the coefficient of friction is equal to road adhesion coefficient when the vehicle is stationary. In this paper, the detailed dynamical models describing the whole process of the front wheel and tire rebound are established. Furthermore, the Luenberger reduced-order disturbance observer is established to estimate the friction moment, and then the adhesion coefficient is estimated. The SBW system which is usually equipped in intelligent vehicles can control the steer moment and steer angle accurately. When the steer wheel turns to certain angle, the SBW system is able to stop outputting torque quickly and timely, which is important for improving the experiment accuracy. In this paper, the SBW system is used to conduct an experiment on different roads. The experiment results demonstrate the validity of this method.

scholarly journals Lane Change Behavior on Freeways: An Online Survey Using Video Clips

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
V. L. Knoop ◽  
M. Keyvan-Ekbatani ◽  
M. de Baat ◽  
H. Taale ◽  
S. P. Hoogendoorn
Keyword(s):  
Online Survey ◽  
Simulation Models ◽  
Lane Changes ◽  
The Road ◽  
Video Clips ◽  
Road Capacity ◽  
Change Behavior ◽  
Instrumented Vehicle ◽  
The Moment ◽  
The Right

Freeways form an important part of the road network. Yet, driving behavior on freeways, in particular lane changes and the relation with the choice of speed, is not well understood. To overcome this, an online survey has been carried out. Drivers were shown video clips, and after each clip they had to indicate what they would do after the moment the video stopped. A total of 1258 Dutch respondents completed the survey. The results show that most people have a strategy to choose a speed first and stick to that, which is the first strategy. A second, less often chosen, strategy is to choose a desired lane and adapt the speed based on the chosen lane. A third strategy, slightly less frequently chosen, is that drivers have a desired speed, but contrary to the first strategy, they increase this speed when they are in a different lane overtaking another driver. A small fraction have neither a desired speed nor a desired lane. Of the respondents 80% use the right lane if possible, and 80% avoid overtaking at the right. Also 80% give way to merging traffic. The survey was validated by 25 survey respondents also driving an instrumented vehicle. The strategies in this drive were similar to those in the survey. The findings of this work can be implemented in traffic simulation models, e.g., to determine road capacity and constraints in geometric design.

scholarly journals CONCEPT OF PROTECTED NETWORKS CREATION

2020 ◽  
pp. 87-94
Author(s):  
Aigul Ospanovna Dauitbayeva ◽  
Elmira Nurlanovna Tulegenova ◽  
Sapar Omir ◽  
Mukhtar Kozhan
Keyword(s):  
Remote Access ◽  
The Road ◽  
Corporate Information System ◽  
On The Road ◽  
The Moment ◽  
Fixed Line ◽  
Voice Data ◽  
The Voice ◽  
Corporate Information ◽  
High Place

Nowadays, it is important for users to know how to contact a corporate information system. There is a need for broadband connection, whether it’s fixed line or Wi-Fi, as it’s not rare for users to work on the road. At the moment, virtual technologies are widely popular, they have a high place in modern companies. Because they allow the voice server to communicate to one workplace. It does not require staff always to keep up-to-date with the Service, and there’s no need to be there, so use remote access. Many institutions have been fixed or fixed through a mobile connection that ensures optimal connection of mobile workers through the terminal. They work with voice data transmission services. It ensures that employees are always in touch.

scholarly journals Mobile accident report and road assistance application

2018 ◽  
Vol 8 (3) ◽  
pp. 124-128
Author(s):  
Nadide Duygu Solak ◽  
Murat Topaloglu
Keyword(s):  
Mobile Devices ◽  
Mobile Applications ◽  
Mobile Application ◽  
Traffic Accident ◽  
Daily Life ◽  
Smart Devices ◽  
Loss Assessment ◽  
The Road ◽  
Speed Up ◽  
The Moment

The number of mobile applications has been increasing rapidly in every field of life with the increasing use of smart devices. Smartphones and tablets make our lives easier with their properties and application they include. Minor or major accidents in traffic are always present in the daily life resulting in financial damage and loss of lives. There have been a number of studies done to speed up the processes to be done from the moment an accident happens. This study aims to enable people to perform all of the post-accident processes quickly and accurately with the use of mobile devices. In this way, papers and documents like photographs will be sent to the competent authorities without wasting time and effort. In addition, access to the road assistance needed will be quite easy. Keywords: Traffic accident, loss assessment and proceedings, mobile application.

scholarly journals The Road to Parenthood: Income and First Births in Sweden

2016 ◽  
Vol 50 ◽  
pp. 31-52 ◽  
Author(s):  
Ernesto Germán Silva
Keyword(s):  
Gender Differences ◽  
Positive Association ◽  
Income Effect ◽  
Entire Population ◽  
Men And Women ◽  
The Road ◽  
The Moment ◽  
Over Time

This paper considers the effect of income on the risk of having the first births in Sweden from 1968 to 2009. Variations by gender are given particular atention. The study follows men and women from the moment they turn 18 until they enter parenthood and it is based on register-based data covering the entire population of Sweden. Complementary log-log models show that there is a positive association between income and the risk of childbearing. The association gets stronger over time and the differences between men and women diminish. Gender differences appear when the income effect is related to the demand for work in the economy. An income above the median does not increase the risk of childbearing for women when the demand for work is relatively high.

Site Unseen

Site Reading ◽  
2018 ◽  
pp. 149-156
Author(s):  
David J. Alworth
Keyword(s):  
Social Order ◽  
Social Problems ◽  
Climate Model ◽  
Thought Experiment ◽  
Narrative Form ◽  
The Novel ◽  
The Road ◽  
Sociological Thought ◽  
The Moment ◽  
A Site

This chapter argues that to perform a site reading of Cormac McCarthy's The Road is to appreciate how the text functions as a novel of purpose that aims to vivify the planet as what Latour would call a “matter of concern.” Still, The Road reads less as a critique of contemporary social problems than as a “thought-experiment,” a sort of literary climate model, forecasting a chillingly plausible correlation between a ruined site and a grisly social order. By imagining this correlation through narrative form, McCarthy offers his own striking contribution to environmental and sociological thought, a contribution that starts to become apparent the moment we ask how his setting functions as an actant, both in the novel itself and beyond.

The Sense of an Ending: Music, Time and Romance in Before Sunrise

2018 ◽  
pp. 167-182
Author(s):  
Carlo Cenciarelli
Keyword(s):  
Central Europe ◽  
The Road ◽  
Cinematic Experience ◽  
On The Road ◽  
The Moment

Right from the start, Before Sunrise presents us with the problem of its ending. The film narrates the on-the-road romance of Jesse and Celine, who meet on a train through central Europe, fall for each other, and decide to spend a day and night together in Vienna before continuing their respective journeys, never to see each other again. In a move that is typical of indie cinema, the two protagonists trade the idea of a ‘happily ever after’ with the possibility of experiencing a moment together. And yet, for this same reason, their time together is inseparable from the feeling of the approaching goodbye, which threatens their very ability to experience the moment. My chapter explores how Before Sunrise draws on music to find a solution to this conundrum. I show that, as we approach the temporal deadline of the title, Bach’s music is used to mobilise a set of complementary eschatological frameworks that are meant both to freeze and extend the time in Vienna. More broadly, I suggest that the film provides a model of cinema’s use of music to make sense of endings and of the time-bound nature of the cinematic experience.

The Integrative Time-Dependent Modeling of the Reliability and Failure of the Causes of Drivers' Error Leading to Road Accidents

2015 ◽  
pp. 1279-1294
Author(s):  
Khashayar Hojjati-Emami ◽  
Balbir S. Dhillon ◽  
Kouroush Jenab
Keyword(s):  
Human Error ◽  
Time Dependent ◽  
Failure Rates ◽  
Road Accidents ◽  
Road Transportation ◽  
The Road ◽  
Representational Model ◽  
On The Road ◽  
The Moment ◽  
Dependent Failure

Nowadays, the human error is usually identified as the conclusive cause of investigations in road accidents. The human although is the person in control of vehicle until the moment of crash but it has to be understood that the human is under continued impact by various factors including road environment, vehicle and human's state, abilities and conduct. The current advances in design of vehicle and roads have been intended to provide drivers with extra comfort with less physical and mental efforts, whereas the fatigue imposed on driver is just being transformed from over-load fatigue to under-load fatigue and boredom. A representational model to illustrate the relationships between design and condition of vehicle and road as well as driver's condition and state on fatigue and the human error leading to accidents has been developed. Thereafter, the stochastic mathematical models based on time-dependent failure rates were developed to make prediction on the road transportation reliability and failure probabilities due to each cause (vehicle, road environment, human due to fatigue, and human due to non fatigue factors). Furthermore, the supportive assessment methodology and models to assess and predict the failure rates of driver due to each category of causes were developed and proposed.

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