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- Active safety system; Automatic; Brake; Car; Collision avoidance system; Conference; Driver assistance system; Germany; Impact test (veh); Rear end collision; Severity (accid (1)
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Mechanical properties of tibial bone at compressive strain rates of 50-200 s-1 are obtained through Split Hopkinson pressure bar. Cylindrical specimens of 12-15 mm diameter and 2-5 mm thickness were used. The Young- moduli are calculated from linear portion of stress-strain curves. For both cortical and cancellous part of the bones, the Young- modulus was found to increase with the increasing strain rates. Also for both cancellous and cortical bones the Young- modulus increases consistently with increase in densities.
Before 2002, France was in the queue of Europeans countries in terms of road safety results because of the low density of population and the faulty behaviour of French due itself to a very low level of traffic law enforcement Even if there were signs of the change of mind in France towards road safety before, the turning point was in summer 2002, when the President declared road safety as a priority work during his mandate. The more symbolic measure was the decision to settle an automatic speed control system (700 fixed and 300 mobile). Over three years, the average speed on French roads decreased by 5 km/h and the number of fatalities on road turned down from an average of 8000 deaths per year to 5 300, which represents a decrease of more than 34 %. For the next months, we anticipate that, as many drivers have kept loosing points on their driving licence through light speed violations, this will lead drivers to check their speed and the speed limits more systematically as loosing points on one's driving license has longer time effects than paying a fine. Consequently, we expect a decrease of 10 % to 15% of fatalities in 2006, which is a very good result if we compare with the trend of the last twenty five years (about 2,3 %). The reverse effect of this system that lies on the changes of behaviour of the majority is that, there is more and more discontent against the system taking into account that automatic speed control system allows only a minor tolerance above limits and that local speed limits are not always adapted to local infrastructure and traffic conditions. Another weakness of the system is that motorcyclists are too rarely caught by the system; the system is being gradually improved by placing the new speed cameras in position of taking photographs of the back of the vehicle. But this would not be sufficient to reduce the speed of motorcyclists that are a very high risk group (16% of fatalities for 0,8 % of traffic) For alcohol, there is no easy route for progress: all what is done nowadays is toward festive impaired driving (through designating sober drivers or mass alcohol preventive screenings) although there is not enough done towards chronic alcoholic driving.
An eCall device has been mounted on some vehicles in France since 2003. It is an integrated car radio/GSM/GPS system that can be used with a SIM card. When an accident occurs, a call can be sent manually or automatically made to a telephone call centre. Knowing the geographic location, the vehicle identity and the possibility of a direct communication with the people involved enables the nearest emergency services to be called out. In this context, the LAB / CEESAR have set up a study aimed at evaluating the effectiveness of this system. The purpose of this paper is to detail the E-call system evaluation method of effectiveness used and give a global synthesis of the results.
This work aims at bringing evidence for mass incompatibility in frontal impact for cars built according to the UNECE R94 regulation. French national injury accidents database census for years 2005 to 2008 were used for the analysis. The heterogeneity of frontal self-protection among cars of different masses is investigated, as well as the partner protection parameter offered by these cars. The last part of the analysis deals with the estimation of the benefit, in terms of fatal and severe injuries avoided, if crashworthiness was harmonized for the whole fleet of vehicle. This calculation is done for France and is extended to all Europe.
The need of passive safety devices, able to reduce the accidents and the severity of injuries suffered by motorcyclist, distinctly arises from data on accident statistics. In this paper, the effectiveness of an airbag device fitted in the biker- garments has been verified through various numerical simulations. Two simple test conditions were defined, in order to investigate the performance of the device both for back and front impacts, and simulated at various impact speeds. With the aim of providing more information about the actual capability of the airbag to reduce the severity of the injuries, one of accident scenario described by ISO 13232:2005 has been also investigated, checking the real effectiveness of the airbag strap-based firing system too. Confrontation of injury indexes resulting from simulation with and without airbag made possible a realistic evaluation of the harm reduction induced by the airbag presence.
Among European Countries, Spain first issued a Standard, UNE 135900:2005, further updated in 2008, that deals with homologation and effectiveness evaluation of road restraint systems components designed to reduce harm for bikers impacting on them. An in depth analysis and critical review of this standard is reported in this paper. Beside a close examination of the standard requirements, numerical models of the crash test stated by the standard have been set up and simulated to study the effects of slight speed and approach angle variations on test results, remaining within tolerance gaps allowed by the standard. Model were validated against experimental data. Together with the expected increasing severity of the impact according with speed, a strong influence of approach angle on injury parameters was found. Possible improvements to the norm, in order to make it more robust, are suggested.
The market introduction and penetration of electric vehicles can be seen as a milestone in order to reduce the environmental burden imposed by the transport sector. The wide-spread use of electric vehicles powered by electricity from renewable sources promises a substantial reduction of local emissions in urban areas as well as greenhouse gas emissions. To be a successful mobility alternative several obstacles and challenges have to be overcome first. Especially the customers' purchase decision determines finally whether an innovation like electromobility will be successful. Therefore, this paper concentrates on demand-related obstacles and barriers for a broad market deployment of electric cars. Within the Electromobility+ project eMAP these issues are investigated via a consumer survey. It was designed to identify the awareness of potential consumers of electric cars as well as give an estimate of the attitude towards this new technology. In addition to the picture of potential demand-related obstacles the consumers were asked to evaluate the suitability of various promotion measures.
Supervision of the safety performance in public transport is one of the main tasks of the Federal Office of Transport (FOT) in Switzerland. Recently a three level system of safety indicators has been defined to cover all means of Swiss public transport. The safety indicators are fed by the FOT incident database since the year 2000. In cooperation with the Institute for Traffic Safety and Automation Engineering (iVA) at TU Braunschweig, Germany, FOT is developing a suitable methodology for the definition and evaluation of the safety targets in Swiss public transport. The methodology is applied for evaluation of safety indicators on a country level and for single transport companies. In a new approach the abovementioned methodology is applied to car incident data to develop an indicator based cross-modal safety measure.
The average CO2 concentrations relevant to a motorcyclist wearing an integral helmet were measured twenty years ago and found to be alarmingly high. The present study examined gas concentrations typically inhaled by a motorcyclist. Average concentrations of CO2 for persons (n=4) wearing integral motorcycle helmets were measured in the laboratory and the field to facilitate comparison to previous work, and similarly high average concentrations were found: above 2% when stationary, well below 1% for speeds of 50km/h or more. Detailed measurements of the time-dependent CO2 concentrations during normal inhalation showed levels of about half of the corresponding average concentrations, including 1% at standstill, though higher concentrations (4% or more) are inhaled at the beginning of each breath. Opening the visor at standstill lowered the average inhaled concentration only to about 0.8%. The oxygen deficiency is equal to the CO2 concentration, and could also contribute negatively to motorcyclist cognitive abilities.
Bicyclists and pedestrians belong to the most endangered groups in urban traffic. The EU-funded collaborative research project PROSPECT (‘PROactive Safety for PEdestrians and CyclisTs´) aims to significantly improve safety of those unprotected traffic participants by expanding the scope of scenarios covered by future active safety systems in passenger cars. Concepts for sensor control systems are built into three prototypes covering emergency interventions such as Autonomous Emergency Braking (AEB) as well as Autonomous Emergency Steering (AES). These systems tackle the well-known challenges of currently available systems including limited field-of-view by sensors, fuzzy path prediction, unreliable intent reaction times and slow reaction times. These highly innovative functions call for extensive validation methodologies based on already established consumer testing procedures. Since these functions are developed towards the prevention of intersection accidents in urban areas, a key aspect of the advanced testing methodology is the valid approximation of naturalistic trajectories using driving robots. Eventually, several simulator studies complemented a user acceptance and benefit analysis to evaluate the expected overall impact of the PROSPECT systems. The results achieved within the PROSPECT project are highly relevant for upcoming test protocols regarding the most critical situations with Vulnerable Road Users (VRU). With introducing the new methods in Euro NCAP (European New Car Assessment Programme) a significant increase in road safety is expected.