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https://www.readbyqxmd.com/read/29227692/autonomous-emergency-braking-systems-adapted-to-snowy-road-conditions-improve-drivers-perceived-safety-and-trust
#1
Ioana Koglbauer, Jürgen Holzinger, Arno Eichberger, Cornelia Lex
OBJECTIVE: This study investigated drivers' evaluation of a conventional autonomous emergency braking (AEB) system on high and reduced tire-road friction, and compared these results to those of an AEB system adaptive to the reduced tire-road friction by earlier braking. Currently automated systems such as the AEB do not adapt the vehicle control strategy to the road friction, e.g. on snowy roads. Since winter precipitation is associated with a 19% increase in traffic crashes and a 13% increase in injuries compared to dry conditions, the potential of conventional AEB to prevent collisions could be significantly improved by including friction in the control algorithm...
December 11, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/29214988/anthropometric-characteristics-and-traffic-accident-circumstances-of-patients-with-isolated-whiplash-injury-in-university-clinical-hospital-mostar
#2
Pejana Rastović, Marija Definis Gojanović, Ines Perić, Marko Pavlović, Josip Lesko, Gordan Galić, Marko Ostojić
Aim To investigate anthropometric characteristics and traffic accident circumstances of subjects with isolated whiplash injury. Methods This cross sectional study involved 75 subjects from traffic accidents with isolated whiplash injury classified by Quebec Task Force (QTF). Anthropometric data were collected as well as claims about circumstances of traffic accidents. Results Distribution of 1st (28; 37.3%), 2nd (25; 33.3%) and 3rd (22; 29.3%) grade of whiplash injury was almost equal. Females had smaller anthropometric measurements than males; neck circumference was the most significant difference between males and females in the context of whiplash injury...
February 1, 2018: Medicinski Glasnik
https://www.readbyqxmd.com/read/29203024/rage-against-the-machine-google-s-self-driving-cars-versus-human-drivers
#3
Eric R Teoh, David G Kidd
INTRODUCTION: Automated driving represents both challenges and opportunities in highway safety. Google has been developing self-driving cars and testing them under employee supervision on public roads since 2009. These vehicles have been involved in several crashes, and it is of interest how this testing program compares to human drivers in terms of safety. METHODS: Google car crashes were coded by type and severity based on narratives released by Google. Crash rates per million vehicle miles traveled (VMT) were computed for crashes deemed severe enough to be reportable to police...
December 2017: Journal of Safety Research
https://www.readbyqxmd.com/read/29203019/using-naturalistic-driving-study-data-to-investigate-the-impact-of-driver-distraction-on-driver-s-brake-reaction-time-in-freeway-rear-end-events-in-car-following-situation
#4
Jingru Gao, Gary A Davis
INTRODUCTION: The rear-end crash is one of the most common freeway crash types, and driver distraction is often cited as a leading cause of rear-end crashes. Previous research indicates that driver distraction could have negative effects on driving performance, but the specific association between driver distraction and crash risk is still not fully revealed. This study sought to understand the mechanism by which driver distraction, defined as secondary task distraction, could influence crash risk, as indicated by a driver's reaction time, in freeway car-following situations...
December 2017: Journal of Safety Research
https://www.readbyqxmd.com/read/29149879/risk-management-of-emergency-service-vehicle-crashes-in-the-united-states-fire-service-process-outputs-and-recommendations
#5
David P Bui, Keshia P Porter, Stephanie Griffin, Dustin D French, Alesia M Jung, Stephen Crothers, Jefferey L Burgess
BACKGROUND: Emergency service vehicle crashes (ESVCs) are a leading cause of death in the United States fire service. Risk management (RM) is a proactive process for identifying occupational risks and reducing hazards and unwanted events through an iterative process of scoping hazards, risk assessment, and implementing controls. We describe the process, outputs, and lessons learned from the application of a proactive RM process to reduce ESVCs in US fire departments. METHODS: Three fire departments representative of urban, suburban, and rural geographies, participated in a facilitated RM process delivered through focus groups and stakeholder discussion...
November 17, 2017: BMC Public Health
https://www.readbyqxmd.com/read/29121894/frequency-of-acute-cervical-and-lumbar-pathology-in-common-types-of-motor-vehicle-collisions-a-retrospective-record-review
#6
Rami Hashish, Hasan Badday
BACKGROUND: There are more than 5 million motor vehicle collisions annually in the United States, resulting in more than 2 million injured occupants. The most common types of collisions are head-on impacts, rear-ends, side-swipes, and t-bones, whilst the most common injury sites are the cervical and lumbar spine. The purpose of this retrospective record review was to examine the differences in frequency of cervical and lumbar pathology across and between these common collision types. METHODS: Nine-hundred and three patients were included in this analysis, 88 of whom described being in a head-on collision, 546 in a rear-end, 123 in a side-swipe, and 146 in a t-bone...
November 9, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29101787/how-safe-is-tuning-a-radio-using-the-radio-tuning-task-as-a-benchmark-for-distracted-driving
#7
Ja Young Lee, John D Lee, Jonas Bärgman, Joonbum Lee, Bryan Reimer
Drivers engage in non-driving tasks while driving, such as interactions entertainment systems. Studies have identified glance patterns related to such interactions, and manual radio tuning has been used as a reference task to set an upper bound on the acceptable demand of interactions. Consequently, some view the risk associated with radio tuning as defining the upper limit of glance measures associated with visual-manual in-vehicle activities. However, we have little knowledge about the actual degree of crash risk that radio tuning poses and, by extension, the risk of tasks that have similar glance patterns as the radio tuning task...
October 27, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/29078072/development-of-a-lane-change-risk-index-using-vehicle-trajectory-data
#8
Hyunjin Park, Cheol Oh, Jaepil Moon, Seongho Kim
Surrogate safety measures (SSMs) have been widely used to evaluate crash potential, which is fundamental for the development of effective safety countermeasures. Unlike existing SSMs, which are mainly focused on the evaluation of longitudinal vehicle maneuvering leading to rear-end crashes, this study proposes a new method for estimating crash risk while a subject vehicle changes lanes, referred to as the lane change risk index (LCRI). A novel feature of the proposed methodology is its incorporation of the amount of exposure time to potential crash and the expected crash severity level by applying a fault tree analysis (FTA) to the evaluation framework...
October 24, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/29041759/assembly-and-alignment-method-for-optimized-spatial-resolution-of-off-axis-three-mirror-fore-optics-of-hyperspectral-imager
#9
Youngsoo Kim, Jinsuk Hong, Byungin Choi, Jong-Ung Lee, Yeonsoo Kim, Hyunsook Kim
A fore optics for the hyperspectral spectrometer is designed, manufactured, assembled, and aligned. The optics has a telecentric off-axis three-mirror configuration with a field of view wider than 14 degrees and an f-number as small as 2.3. The primary mirror (M1) and the secondary mirror (M2) are axially symmetric aspheric surfaces to minimize the sensitivity. The tertiary mirror (M3) is a decentered aspheric surface to minimize the coma and astigmatism aberration. The M2 also has a hole for the slit to maintain the optical performance while maximizing the telecentricity...
August 21, 2017: Optics Express
https://www.readbyqxmd.com/read/29040294/towards-social-autonomous-vehicles-efficient-collision-avoidance-scheme-using-richardson-s-arms-race-model
#10
Faisal Riaz, Muaz A Niazi
This paper presents the concept of a social autonomous agent to conceptualize such Autonomous Vehicles (AVs), which interacts with other AVs using social manners similar to human behavior. The presented AVs also have the capability of predicting intentions, i.e. mentalizing and copying the actions of each other, i.e. mirroring. Exploratory Agent Based Modeling (EABM) level of the Cognitive Agent Based Computing (CABC) framework has been utilized to design the proposed social agent. Furthermore, to emulate the functionality of mentalizing and mirroring modules of proposed social agent, a tailored mathematical model of the Richardson's arms race model has also been presented...
2017: PloS One
https://www.readbyqxmd.com/read/28990037/spreading-dynamics-of-a-precursor-film-of-nanodrops-on-total-wetting-surfaces
#11
Yu-Hsuan Weng, Cyuan-Jhang Wu, Heng-Kwong Tsao, Yu-Jane Sheng
The spreading dynamics of a nanodrop on a total wetting surface is explored by many-body dissipative particle dynamics. Both smooth and rough surfaces with various spreading coefficients (S) are considered. The evolution of the spreading film is mainly characterized by the radius of the wetting area (Rp) and the apparent base radius (Rb) and the contact angle (θ) of the spherical cap. The difference between Rp and Rb reveals the presence of the precursor film. The dynamic behavior can be described by the power law: Rp ∼ t(m), Rb ∼ t(n), and θ ∼ t(-α)...
October 18, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28922081/clinical-outcomes-following-conservative-management-of-chronic-traumatic-cervical-myelopathy-a-case-report
#12
Justin Bridges, Roberto Sandoval
BACKGROUND AND PURPOSE: There is limited evidence supporting the conservative management of patients with cervical myelopathy. The purpose of this report is to describe the intervention and outcomes of conservative physical therapy interventions for one patient with chronic cervical myelopathy. CASE DESCRIPTION: This case was a 50-year-old male who sustained a neck injury following a rear-end collision 4 years prior to this therapeutic episode. The patient presented with decreased range of motion in the cervical spine and right upper extremity, strength deficits, altered sensation, poor posture, and reported chronic cervical region pain and difficulty sleeping...
September 18, 2017: Physiotherapy Theory and Practice
https://www.readbyqxmd.com/read/28911878/comparison-of-proposed-countermeasures-for-dilemma-zone-at-signalized-intersections-based-on-cellular-automata-simulations
#13
Yina Wu, Mohamed Abdel-Aty, Yaoxian Ding, Bin Jia, Qi Shi, Xuedong Yan
The Type II dilemma zone describes the road segment to a signalized intersection where drivers have difficulties to decide either stop or go at the onset of yellow signal. Such phenomenon can result in an increased crash risk at signalized intersections. Different types of warning systems have been proposed to help drivers make decisions. Although the warning systems help to improve drivers' behavior, they also have several disadvantages such as increasing rear-end crashes or red-light running (RLR) violations...
September 11, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28886141/the-impact-of-vehicle-moving-violations-and-freeway-traffic-flow-on-crash-risk-an-application-of-plugin-development-for-microsimulation
#14
Junhua Wang, Yumeng Kong, Ting Fu, Joshua Stipancic
This paper presents the use of the Aimsun microsimulation program to simulate vehicle violating behaviors and observe their impact on road traffic crash risk. Plugins for violations of speeding, slow driving, and abrupt stopping were developed using Aimsun's API and SDK module. A safety analysis plugin for investigating probability of rear-end collisions was developed, and a method for analyzing collision risk is proposed. A Fuzzy C-mean Clustering algorithm was developed to identify high risk states in different road segments over time...
2017: PloS One
https://www.readbyqxmd.com/read/28882261/factors-contributing-to-commercial-vehicle-rear-end-conflicts-in-china-a-study-using-on-board-event-data-recorders
#15
Giulio Bianchi Piccinini, Johan Engström, Jonas Bärgman, Xuesong Wang
INTRODUCTION: In the last 30years, China has undergone a dramatic increase in vehicle ownership and a resulting escalation in the number of road crashes. Although crash figures are decreasing today, they remain high; it is therefore important to investigate crash causation mechanisms to further improve road safety in China. METHOD: To shed more light on the topic, naturalistic driving data was collected in Shanghai as part of the evaluation of a behavior-based safety service...
September 2017: Journal of Safety Research
https://www.readbyqxmd.com/read/28882258/effects-of-red-light-running-camera-systems-installation-and-then-deactivation-on-intersection-safety
#16
Myunghoon Ko, Srinivas Reddy Geedipally, Troy Duane Walden, Robert Carl Wunderlich
INTRODUCTION: The primary objective of this paper is to evaluate the safety impacts of red-light running camera (RLC) system installation and then deactivation at 48 intersections in Houston, Texas. The second objective is to evaluate the spillover effect at nearby non-treated intersections in Houston after the deactivation. METHODS: To accomplish study objectives, an Empirical Bayes (EB) before-after analysis was used. RESULTS: The results indicate statistically significant collision reductions on all red-light running (RLR) crash types (37 percent) as well as right-angle RLR crashes (47 percent) at the treated intersections after RLC activation...
September 2017: Journal of Safety Research
https://www.readbyqxmd.com/read/28832518/basic-simulation-environment-for-highly-customized-connected-and-autonomous-vehicle-kinematic-scenarios
#17
Linguo Chai, Baigen Cai, Wei ShangGuan, Jian Wang, Huashen Wang
To enhance the reality of Connected and Autonomous Vehicles (CAVs) kinematic simulation scenarios and to guarantee the accuracy and reliability of the verification, a four-layer CAVs kinematic simulation framework, which is composed with road network layer, vehicle operating layer, uncertainties modelling layer and demonstrating layer, is proposed in this paper. Properties of the intersections are defined to describe the road network. A target position based vehicle position updating method is designed to simulate such vehicle behaviors as lane changing and turning...
August 23, 2017: Sensors
https://www.readbyqxmd.com/read/28803960/evaluating-impacts-of-different-longitudinal-driver-assistance-systems-on-reducing-multi-vehicle-rear-end-crashes-during-small-scale-inclement-weather
#18
Ye Li, Lu Xing, Wei Wang, Hao Wang, Changyin Dong, Shanwen Liu
Multi-vehicle rear-end (MVRE) crashes during small-scale inclement (SSI) weather cause high fatality rates on freeways, which cannot be solved by traditional speed limit strategies. This study aimed to reduce MVRE crash risks during SSI weather using different longitudinal driver assistance systems (LDAS). The impact factors on MVRE crashes during SSI weather were firstly analyzed. Then, four LDAS, including Forward collision warning (FCW), Autonomous emergency braking (AEB), Adaptive cruise control (ACC) and Cooperative ACC (CACC), were modeled based on a unified platform, the Intelligent Driver Model (IDM)...
August 9, 2017: Accident; Analysis and Prevention
https://www.readbyqxmd.com/read/28777766/risk-factors-for-roadway-single-and-multi-vehicle-all-terrain-vehicle-crashes-in-pennsylvania-2010-2013
#19
Serap Gorucu, Dennis Murphy, Cathy Kassab
BACKGROUND: All Terrain Vehicles on public roadways become major risk factors for the motorists. OBJECTIVE: To compare characteristics of crashes and injury severity related to single vehicle (SV) and multi-vehicle (MV) All-Terrain Vehicle (ATV) roadway crashes in Pennsylvania, USA. METHODS: Data on ATV crashes occurring on public roads during the years 2010-2013 was obtained from the Pennsylvania Department of Transportation (PennDOT) and analyzed...
2017: Work: a Journal of Prevention, Assessment, and Rehabilitation
https://www.readbyqxmd.com/read/28709110/a-full-bayesian-approach-to-appraise-the-safety-effects-of-pedestrian-countdown-signals-to-drivers
#20
Angela E Kitali, P E Thobias Sando
Although they are meant for pedestrians, pedestrian countdown signals (PCSs) give cues to drivers about the length of the remaining green phase, hence affecting drivers' behavior at intersections. This study focuses on the evaluation of the safety effectiveness of PCSs to drivers, in the cities of Jacksonville and Gainesville, Florida, using crash modification factors (CMFs) and crash modification functions (CMFunctions). A full Bayes (FB) before-and-after with comparison group method was used to quantify the safety impacts of PCSs to drivers...
July 11, 2017: Accident; Analysis and Prevention
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