Reduced sensitivity to visual looming inflates the risk posed by speeding vehicles when children try to cross the road

Almost all locomotor animals respond to visual looming or to discrete changes in optical size. The need to detect and process looming remains critically important for humans in everyday life. Road traffic statistics confirm that children up to 15 years old are overrepresented in pedestrian casualties. We demonstrate that, for a given pedestrian crossing time, vehicles traveling faster loom less than slower vehicles, which creates a dangerous illusion in which faster vehicles may be perceived as not approaching. Our results from perceptual tests of looming thresholds show strong developmental trends in sensitivity, such that children may not be able to detect vehicles approaching at speeds in excess of 20 mph. This creates a risk of injudicious road crossing in urban settings when traffic speeds are higher than 20 mph. The risk is exacerbated because vehicles moving faster than this speed are more likely to result in pedestrian fatalities

Road Trauma in Teenage Male Youth with Childhood Disruptive Behavior Disorders: A Population Based Analysis

Donald Redelmeier and colleagues conducted a population-based case-control study of 16-19-year-old males hospitalized for road trauma or appendicitis and showed that disruptive behavior disorders explained a significant amount of road trauma in this group

An overview of the approaches for automotive safety integrity levels allocation

YesISO 26262, titled Road Vehicles–Functional Safety, is the new automotive functional safety standard for passenger vehicle industry. In order to accomplish the goal of designing and developing dependable automotive systems, ISO 26262 uses the concept of Automotive Safety Integrity Levels (ASILs), the adaptation of Safety Integrity Levels. ASILs are allocated to the components and subsystems that can cause system failure and malfunctions that lead to hazards. ASILs allocation is a hard problem consists of finding the optimal allocation of safety levels to the system architecture which must guarantee that the highest safety requirements are met while development cost of the automotive system is kept minimum. There were many successful attempts to solve this problem using different techniques. However, it is worth pointing out that there is an absence of a review that provides an in-depth study of all the existing methods and highlights their merits and demerits. This paper presents an overview of different approaches that were used to solve ASILs allocation problem. The review provides an overview of safety requirements including the related standards followed by a study of the resolution methods of the existing approaches. The study of each approach provides a detailed explanation of the used methodology and a discussion of its strength and weaknesses including the main open challenges

Understanding the social context of fatal road traffic collisions among young people: A qualitative analysis of narrative text in coroners' records

Background: Deaths and injuries on the road remain a major cause of premature death among young people across the world. Routinely collected data usually focuses on the mechanism of road traffic collisions and basic demographic data of those involved. This study aimed to supplement these routine sources with a thematic analysis of narrative text contained in coroners' records, to explore the wider social context in which collisions occur. Methods. Thematic analysis of narrative text from Coroners' records, retrieved from thirty-four fatalities among young people (16-24 year olds) occurring as a result of thirty road traffic collisions in a rural county in the south of England over the period 2005-2010. Results: Six key themes emerged: social driving, driving experience, interest in motor vehicles, driving behaviour, perception of driving ability, and emotional distress. Social driving (defined as a group of related behaviours including: driving as a social event in itself (i.e. without a pre-specified destination); driving to or from a social event; driving with accompanying passengers; driving late at night; driving where alcohol or drugs were a feature of the journey) was identified as a common feature across cases. Conclusions: Analysis of the wider social context in which road traffic collisions occur in young people can provide important information for understanding why collisions happen and developing targeted interventions to prevent them. It can complement routinely collected data, which often focuses on events immediately preceding a collision. Qualitative analysis of narrative text in coroner's records may provide a way of providing this type of information. These findings provide additional support for the case for Graduated Driver Licensing programmes to reduce collisions involving young people, and also suggest that road safety interventions need to take a more community development approach, recognising the importance of social context and focusing on social networks of young people. © 2014 Pilkington et al.; licensee BioMed Central Ltd

Randomisation and resource allocation: a missed opportunity for evaluating health care and social interventions

Equipoise is widely regarded to be an essential prerequisite for the ethical conduct of a randomised controlled trial. There are some circumstances however, under which it is acceptable to conduct a randomised controlled trial (RCT) in the absence of equipoise. Limited access to the preferred intervention is one such circumstance. In this paper we present an example of a randomised trial in which access to the preferred intervention, preschool education, was severely limited by resource constraints. The ethical issues that arise when conducting randomised trials in health care are considered in the context of trials of social interventions. In health, education and social welfare, effective interventions are frequently limited due to budgetary constraints. Explicit acknowledgement of the need to ration interventions, and the use of random allocation to do this even in the absence of equipoise, would facilitate learning more about the effects of these interventions. Key Words: Randomised controlled trials • equipoise • rationing • preschoo

Monitoring the decade of action for global road safety 2011–2020: An update

The United Nations Road Safety Collaboration (UNRSC) was set up in 2004 in response to the recognised need for the United Nations (UN) system to encourage efforts to address the global road safety crisis. In 2010, the UN General Assembly Resolution 64/255 declared 2011–2020 the Decade of Action for Road Safety with the overarching goal of stabilising and reducing the forecasted number of road traffic deaths by increasing activities at national, regional and global levels. In 2011, a Plan of Action for the Decade of Action, a tool to support the development of national and local plans of action, was launched. Countries are encouraged to implement activities according to the five pillars set out by the Plan of Action. The UNRSC, tasked to evaluate the overall impact of the Decade, developed and populated indicators for each pillar. Currently, 36 of 38 proposed indicators are populated by baseline data for 2010 from the second Global status report for road safety. However, gaps exist in data quality and availability on a global level. Therefore, there is an urgent need for improving data quality and availability to measure the progress of the Decade of Action

Monitoring the decade of action for global road safety 2011–2020: An update

The United Nations Road Safety Collaboration (UNRSC) was set up in 2004 in response to the recognised need for the United Nations (UN) system to encourage efforts to address the global road safety crisis. In 2010, the UN General Assembly Resolution 64/255 declared 2011–2020 the Decade of Action for Road Safety with the overarching goal of stabilising and reducing the forecasted number of road traffic deaths by increasing activities at national, regional and global levels. In 2011, a Plan of Action for the Decade of Action, a tool to support the development of national and local plans of action, was launched. Countries are encouraged to implement activities according to the five pillars set out by the Plan of Action. The UNRSC, tasked to evaluate the overall impact of the Decade, developed and populated indicators for each pillar. Currently, 36 of 38 proposed indicators are populated by baseline data for 2010 from the second Global status report for road safety. However, gaps exist in data quality and availability on a global level. Therefore, there is an urgent need for improving data quality and availability to measure the progress of the Decade of Action