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In the last years various new driver information and driver assistance systems made their way into modern vehicles and there are yet countless systems underway. However, expenses for both, the development and the construction of these systems are tremendous. Therefore the interest of evaluating systems keeps growing steadily, not only regarding the results of systems developed in the last years but also regarding system ideas. Only if at least a rough benefit estimation is given, the industry can decide which development should be supported. However, there is still a lack of transparency of possible and useful methods for these kinds of estimations. These were analyses and structured in this study.
During the last 5 years, the number of cars fitted with side airbags has dramatically increased. They are now standard equipment, even on many smaller cars or less luxurious vehicles. While some side airbags offer thoracic protection alone, there are those that combine thoracic and head protection (of which most deploy from the seat). Other systems employ separate airbags for head and thorax protection, which are designed to be effective noticeably in a crash against a pole. This paper proposes an evaluation of the effectiveness of side airbags in preventing thoracic injuries to passenger car occupants involved in side crashes. First, the target population (who can take benefit of side airbag deployment and in what circumstances) is defined. Side airbags can be especially effective in cases of impacts on the door with intrusion at a certain impact speed. Then, an example case of a side impact with side airbag deployment is given were side airbag deployment is thought to have had a positive effect on injury outcome. A further case is presented where the impact configuration is likely to have reduced the effect of side airbag deployment on injury outcome. Finally, the estimation of side airbag effectiveness (in terms of additional occupant protection brought exclusively by the airbag) is proposed by comparing injury risk sustained by occupants in (more or less) similar cars (fitted or non fitted with airbags) because, during these years, car structure, and side airbag conception have considerably evolved. In-depth accident data from France, the UK and Germany has been collected. Out of 2,035 side impact accident cases available in the databases, we selected 435 occupants of passenger cars (built from 1998 onwards) involved in an injury accident between year 1998 and year 2004 for EES (Energy Equivalent Speed) values between 20km/h and 50km/h. The occupants, belted or not, were sat on the struck side, whatever the obstacle and type of accidents (intersection, loss of control, etc.). For multiple impact crashes, the side impact is assumed to be the more severe one. Passenger cars were fitted with (96) or without (339) side airbags. Most of the potential risk explanatory variables were correctly and reliably reported in the databases (velocity " impact zone " impact angle " occupant characteristics, etc.). The analysis compared injury risks for different levels of EES and different types of side airbags. A logistic regression model was also computed with injury variables (such as thoracic AIS 2+ or AIS 3+) as the dependant variable and other variables (including airbag type and EES) as explanatory injury risk factors. Results revealed statistically non-significant reductions in thoracic AIS 2+ and AIS 3+ injury risk in side airbag equipped cars in the impact violence range selected (odds ratio between 0.84 and 0.98 depending on types of airbags). The results are discussed. The non-significance is assumed to be due to a low number of cases. Statistical analysis for head injuries was not possible due to the low number of accident cases with passenger cars fitted with head airbags in the databases. Moreover, the discrepancies between the data coming from different countries (especially calculation of EES) might have introduced instability in the analysis.
This study is aimed to investigate the correlations of impact conditions and dynamic responses with the injuries and injury severity of child pedestrians by accident reconstruction. For this purpose, the pedestrian accident cases were selected from Sweden and Germany with detailed information about injuries, accident cars, and accident environment. The selected accident cases were reconstructed using mathematical models of pedestrian and passenger car. The pedestrian models were generated based on the height, weight, and age of the pedestrian involved in accidents. The car models were built up based on the corresponding accident car. The impact speeds in simulations were defined based on the reported data. The calculated physical quantities were analyzed to find the correlation with injury outcomes registered in the accident database. The reconstruction approaches are discussed in terms of data collection, estimating vehicle impact speeds, pedestrian moving speeds and initial posture, secondary ground impact, validity of the mathematical models, as well as impact biomechanics.
Active safety systems are aimed at accident prevention, hence the knowledge required for their development is different from that required for passive safety systems aimed at injury prevention. Particularly, knowledge about accident causation is required. When looking at existing accident causation data, it is argued it fails to explain in sufficient detail how and why the accidents occur. Therefore, there is a need for detailed micro-level descriptions of accident causation mechanisms, and also of methodologies suitable for creating such descriptions. One study addressing these needs is the Swedish project FICA (Factors Influencing the Causation of Accidents and Incidents), where an accident investigation methodology suitable for active safety is developed, and in-depth accident investigations following this methodology are carried out on-scene in the area of Gothenburg by a multidisciplinary team. A preliminary aggregated analysis of different cases shows that the methodology developed is adequate for pointing out common contributing factors and devising principal countermeasures.
Rollover scenarios in Europe
(2005)
Rollover accidents seem to be a rising problem in Europe and therefore the systematic of this accident scenario should be investigated. Based on statistical investigations on major European accident databases for different countries a series of 73 real world rollover accidents was analysed. These cases were reconstructed using PC-Crash and preliminary categorised using a modified USbased rollover classification. In a first step, the rollover events were reconstructed from the point of conflict to the vehicle- rest position. The vehicles kinematics as well as its linear and rotational velocities were derived. In a second step typical velocity characteristics as well as kinematics were identified and the events categorised according to these criteria. Based on these results four main categories were defined, covering all reconstructed accidents. This categorisation was based on mechanical parameters (rotatory and translator kinematical data of the vehicle). Significant differences can be seen for different scenarios for the "first phase of rollover".
This paper set out to examine the possibilities for injury avoidance implications for older drivers in crashes, based on crash and injury patterns among older drivers and current trends in ageing in most western societies. A number of safety technologies were identified and discussed which have potential for improving vehicle older driver crash avoidance and crashworthiness. While there were some promising estimates available of the likely benefits of this technology for improving safety, it is evident that they need to be confirmed for older drivers, given their age-related disabilities and sensory limitations. Further research is urgently required to ensure that these technologies yield safety benefits without any disbenefits for older drivers.rn
Vehicle crash research at different levels is currently being conducted by several investigation groups in Spain, in some instances within various EU-funded projects. However there is a clear opportunity for increasing compatibility and maximizing usefulness, both at national and European levels, of the information collected by these groups. After reviewing on-going activities and programs in different countries, a framework for a nationwide crash investigation project is proposed: an organizational scheme is suggested as part of a future National Road Safety Strategic Plan; a map of investigation teams located in technological centres, universities and police agencies in Spain is presented; alternatives for several practical aspects such as team composition, deployment and operational budgets and project developmental stages are also discussed.
Nigeria ranks one of the highest countries in the world with the largest accident, especially when measured by whiplash associated disorders, whereas, traffic safety education rate, data and information been widely known as preventive indicators have been grossly neglected. In Nigeria, traffic safety enlightenment, awareness, political understanding and appreciation of the problem's magnitude are lacking. This study, therefore, seeks to understand and document the fact that accident causation factors in Nigeria relate more to the problem of development, poverty, knowledge and education as evidenced in most other developing countries. Among the primary accident causation factors on Nigerian roads are: - lack of a transportation system or multi-model integration - sub-standard and obsolete vehicles and road furniture - poor road maintenance, investment and engineering management - paucity of road users' and drivers' knowledge, skill, enlightenment and education of the road Use This paper submits that Nigeria being a developing nation requires purely primitive strategies being cost effective (health wise) than curative measures. It is in this light that an enduring, comprehensive and sustainable traffic safety educational programmes information base and data inventory, analysis and implementations form the focus of this study. This effort will provide basic guidelines framework and implementation procedure for a successful prevention of whiplash associated disorder resulting from road traffic crashes in Nigeria and other parts of the world.
Because of actual developments and the continuous increase in the field of drive assistant systems, representative and detailed investigations of accident databases are necessary. This lecture describes the possibility to estimate the potential of primary and secondary safety measures by means of a computerized case by case analysis. Single primary or secondary safety measures as well as a combination of both are presented. The method is exemplarily shown for the primary safety measure "Brake Assist" in pedestrian accidents. Regarding accident prevention only the primary safety measure is determined.
In-depth road traffic accident research in Spain is a fairly recent activity. In the past, only accident data that had been retrospectively processed by the national and regional traffic police forces was available. In 1999 Applus+IDIADA set up a permanent accident research unit to carry out indepth analysis of road accidents in Spain. Since then accidents involving cars, motorcycles, coaches and vulnerable road users have been thoroughly studied. The Applus+IDIADA accident research team has carried out work for the various traffic polices in Spain and it is currently involved in several research projects in which accidentology is one of the main tasks. The working methodology of the team is presented in the first part of the paper. In the framework of the European research project "Rollover" (GRD2-2001-50086), Applus+IDIADA has collected data, inspected scenarios and performed virtual reconstructions of twenty-six of the total seventy-six rollover accidents studied. The second half of the paper describes how these accident investigations were used to develop a test procedure for identifying possible improvements to the vehicle structure which augment occupant protection in a rollover scenario. In particular, a proposal for a new drop test for rollover assessment is presented. The cases were analysed for severity, in terms of injury to the occupants and damage to the vehicle, and taking into account whether a seatbelt was worn or not. The worst possible cases were identified as those that had severe occupant injuries and sizable damage to the occupant compartment when seatbelts had been worn. The most severe cases were then analysed further for impact position (roll and pitch angles) and the impact velocity. With these parameters taken into account, the most representative combinations could be found. This resulted in a series of configurations for possible drop tests. The results of the tests indicate where passenger vehicle structures need to be improved in order to increase occupant safety in the event of a rollover crash.
Institute for Traffic Accident Research and Data Analysis <Tokyo>rnAbstract: Analyses were conducted to clarify the features of rear-end collisions, using an integrated accident database developed by the Institute for Traffic Accident Research and Data Analysis (ITARDA). Focusing on neck injuries in rear-end collisions, analyses were made of the relation to struck-vehicle properties. Regarding the relation to the initial year of registration, the results did not show that newer vehicles tended to have a lower no-neck-injury rate, which was defined in this study as an index. On the contrary, in some passenger car classes, it was observed that the no-neck-injury rate was higher in newer vehicles. The effect of an active head restraint system, which is one type of anti-whiplash device, was analyzed by using not only the no-neck-injury rate but also a regression analysis. The results showed that the effect of an active head restraint system on suppressing the incidence of neck injuries was statistically significant.rn
The objective of this study was to identify aspects of the individual experience and behaviour of drivers in intersection accidents. A total of 40 accident drivers sketched their ideas and expectations relating to intersection assistance using the method of Structure Formation Technique. Using this method prepared content cards and relation cards for a subject matter are formed together in a structure through the application of an explicit set of rules. The structures generated in this process were compared with the structures of 20 control persons who have not recently experienced an accident at intersections. The basis for this comparison was a case-control design with matched samples regarding the variables age, sex, education, occupation, driving experience and annual mileage. The results of the accident reports indicate that additional assistance is instrumental in the perception of other road users. Generally the interviewed drivers were open-minded towards the use of intersection assistance systems. Drivers who have recently experienced an accident at intersections significantly more often approved of warning assistance in their vehicle than drivers who have not recently experienced an accident. Further accident experienced drivers favoured warning and information via audio warning more frequently. The ideas of the drivers were strongly shaped by the experiences with already available advanced driver assistance systems. Hence acoustic and visual warnings were generally preferred to tactile warnings. The findings also indicate a relationship between the variable age and the acceptance of automatic vehicle intervention, and the suggestion of a head up display as a configuration of a visual warning system.
The price of a new car increased almost every year for a long period. In recent years however, the budget available to most people for purchasing a car either did not grow or became even smaller. Therefore it was in the interest of some OEMs to offer economical car models in the so-called "8,000- Euro class". Here an important question arose regarding the safety of these vehicles. There is no question that the very high safety level of cars reached in Europe during the last decades should not be sacrificed as a consequence of smaller budgets. Customers with sense of responsibility have the right to be properly informed about the balance between safety and price so that they can make a deliberate decision when buying either a new or a used car. Against this background, the German magazine "AutoBILD" commissioned DEKRA to conduct fullscale frontal crash tests with a view to publishing the results. These tests have been carried out in accordance with the corresponding Euro NCAP crash test requirements and performance criteria. The tested vehicles were two new Logans produced by the manufacturer Dacia, two used cars of the type VW Golf IV (registration date 2000) and one new VW Fox. This paper describes the safety features of the vehicles and the results of the five crash tests to demonstrate state-of-the-art safety levels and what levels may be expected from vehicles in the "8,000- Euro class". Looking at real-world crashes it is of interest to think about future trends in a more detailed manner. Therefore it will be more and more necessary to supplement the federal statistics with more detailed in-depth information about the consequences of accidents and the safety performance of crashed vehicles.
In recent years the boundaries between active and passive safety blurred more and more. Passive safety in the traditional term includes all safety aspects to prevent occupants to be injured or at least injury severity should be reduced. Passive Safety starts with the collision (first vehicle contact) and ends with rescue (open vehicle doors). Within this phase the occupant has to be protected by the passenger compartment whereby no intrusion should occur. Active safety on the other side was developed to interact prior to the collision whereby the goal is to prevent accidents. The extensive interaction between active and passive safety led to the terminologies "Primary" and "Secondary" safety whereas the expression Integrated Safety Concept was generated. Within this study the most well documented single vehicle accidents with cars not equipped with ESP were identified from the PENDANT database and reconstructed. Additional cases were found in the database ZEDATU of TU Graz. In comparison each case was simulated with the assumption that the cars were equipped with ESP. The differences regarding accident avoidance or crash severity as well as reduction of injury risk were analysed.
This paper uses the national accident statistics of Great Britain to evaluate the effectiveness of Electronic Stability Control Systems (ESC) to reduce crash involvement rates. The crash experience of 8,951 cars is analysed and compared to a closely matching set of non-ESC cars using case-control methods. This is one of the largest ESC samples analysed to date. Overall the cars with ESC are involved in 3% fewer crashes although the effectiveness is substantially higher under conditions of adverse road friction. ESC equipped cars are involved in 15% fewer fatal crashes although this reduction represents the combined effect of ESC and passive safety improvements.
There is a need for detecting characteristics of pedestrian movement before car-pedestrian collisions to trigger a fully reversible pedestrian protection system. For this purpose, a pedestrian sensor system has been developed. In order to evaluate the effectiveness of the sensor system, the in-depth knowledge of car-pedestrian impact scenarios is needed. This study aims at the evaluation of the sensor system. The accident data are selected from the STRADA database. The accident scenarios available in this database were evaluated and the knowledge of the most common scenarios was developed in terms of the pedestrian trajectory, the pedestrian speed, the car trajectory, the car velocity, etc. A mathematical model was then established to evaluate the sensor system with different detective angles. It was found that in order to detect all the pedestrians in the most common scenarios on time the sensor detective angle must be kept larger than 60 degrees.
Description of road traffic related knee injuries in published investigations is very heterogeneous. The purpose of this study was to estimate the risk of knee injuries in real world car impacts in Germany focusing vulnerable road users (pedestrians, bicyclists and motorcyclists) and restrained car drivers. The accident research unit analyses technical and medical data collected shortly after the accident at scene. Two different periods (years 1985-1993 and 1995-2003) were compared focusing on knee injuries (Abbreviated Injury Scale (AISKnee) 2/3). In order to determine the influences type of collision, direction and speed as well as the injury pattern and different injury scores (AIS, MAIS, ISS) were examined. 1.794 pedestrians, 742 motorcyclists, 2.728 bicyclists and 1.116 car drivers were extracted. 2% had serious ligamentous or bony injuries in relation to all injured. The risk of injury is higher for twowheelers than for pedestrians, but knee injury severity is higher for the latter group. Overall the current knee injury risk is low and significant reduced comparing both time periods (27%, p<0,0001). Severe injuries (AISKnee 2/3) were below 1%). Improved aerodynamic design of car fronts reduced the risk for severe knee injuries significantly (p=0,0015). Highest risk of injury is for motorcycle followed by pedestrians, respectively. Knee protectors could prevent injuries by reducing local forces. The classically described dashboard injury was rarely identified. The overall injury risk for knee injuries in road traffic is lower than estimated and reduced comparing both periods. The aerodynamic shape of current cars compared to older types reduced the incidence and severity of knee injuries. Further modification and optimization of the interior and exterior design could be a proper measurement. Classic described injury mechanisms were rarely identified. It seems that the AIS is still underestimating extremity injuries and their long term results.
16% aller Verkehrstoten in Deutschland sind Motorradfahrer und die Anzahl stagniert auf diesem hohen Niveau. Daher ist eine Verbesserung der Fahrsicherheit von Motorrädern zwingend erforderlich. Im Pkw leisten aktive bzw. verstellbare Fahrwerksysteme einen positiven Beitrag zur Fahrsicherheit und helfen, Unfälle zu vermeiden. Hierzu zählen neben den Fahrdynamikregelsystemen wie ABS und ESP auch Verstelldämpfer und Stabilisatorverstellsysteme. Dämpfer- und Stabilisatorsysteme beeinflussen die dynamische Radlast und können insbesondere im ABS-Regelbereich die Fahrsicherheit erhöhen. Der Einfluss geregelter Dämpfersysteme auf die Fahrsicherheit und den Komfort im Pkw-Bereich ist in ausführlichen Untersuchungen sowohl theoretisch als auch praktisch belegt. Im Kraftradbereich existieren zwar Untersuchungen zu verstellbaren Dämpfersystemen, meist werden hier aber ausschliesslich komfortorientierte Kriterien betrachtet. Neben der Übertragbarkeit der positiven Effekte, die im Pkw-Bereich hinsichtlich Komfort und Fahrsicherheit durch geregelte Dämpfersysteme erreicht werden, auf Krafträder, ist der Einfluss geregelter Systeme auf die besonderen kraftradspezifischen Eigenschaften noch nicht ausführlich simulativ betrachtet worden. Das labile System Kraftrad, das in Abhängigkeit der Fahrgeschwindigkeit stark veränderliche Eigenschaften bezüglich der Eigenstabilisierung aufweist, neigt je nach Geschwindigkeitsbereich zu unterschiedlichem Verhalten. Die Zielsetzung dieser Arbeit liegt somit in der Überpruefung der Übertragbarkeit der aus dem Pkw-Bereich bekannten Einflüsse geregelter Dämpfersysteme auf Fahrkomfort und Fahrsicherheit im Kraftradbereich. Weiter soll hierbei auf kraftradspezifische Fahrsituationen eingegangen werden, die in der Pkw-Forschung auf Grund des abweichenden Systemverhaltens keine Berücksichtigung finden. Die Untersuchung gliedert sich in die Parameterermittlung anhand eines Versuchsmotorrades, die Erstellung und Validierung eines Mehrkörpersimulationsmodells unter Verwendung der Software VI Motorcycle fuer Adams/Car, die Definition, Auswahl und Umsetzung geeigneter Fahrmanöver sowie die Beurteilung des Sicherheitsgewinns. In der Simulationsumgebung VI Motorcycle (Adams/Car) wurden Schnittstellen geschaffen, um (semi-)aktive Fahrwerke einzubinden. Die entsprechenden Regelalgorithmen sowie die Umsetzung der Dämpferkonzepte wurden hierfür in Matlab/Simulink aufgebaut. Im Rahmen dieser Untersuchung wurden zahlreiche Regelalgorithmen und Dämpferkonzepte modelliert und getestet. Es wurde ein Fahrmanöverkatalog mit solchen Fahrversuchen erstellt, die Potenzial fuer einen Sicherheitsgewinn durch aktive Dämpfer erwarten lassen. Fuer die definierten Fahrmanöver wurden Simulationen aller entwickelten Regler und als Referenz auch eines passiven Dämpfersystems durchgeführt. Die Simulationsdaten wurden anhand vorab definierter Beurteilungskriterien ausgewertet. Die Ergebnisse lassen Potenzial zur Steigerung von Fahrsicherheit und Komfort vermuten. Die Erkenntnisse aus dem Pkw-Bereich koennen in weiten Teilen auf den Kraftradbereich übertragen werden. Ein signifikanter Einfluss auf das heutige Unfallgeschehen von Motorrädern ist jedoch als unwahrscheinlich einzuschätzen.
In der öffentlichen Berichterstattung und in einschlägigen Gremien ist das Thema "Kleintransporter" immer wieder Gegenstand der Behandlung. Kleintransporter vereinen die Kapazität von kleinen Güterkraftfahrzeugen mit der Flexibilität und Leistungsfähigkeit von Pkw. Zum Führen dieser Fahrzeuge wird dabei lediglich die normale Pkw-Fahrerlaubnis benötigt. Obwohl das Unfallrisiko von Kleintransportern immer noch höher ist als das für Pkw, kann festgestellt werden, dass sich der starke Anstieg der Unfallanzahlen dieser Fahrzeuge trotz weiterhin steigender Bestandszahlen nicht weiter fortgesetzt hat. Mit dem hier durchgeführten Forschungsvorhaben wurde das Ziel verfolgt, die Maßnahmen und Qualifizierungsprogramme zur Erhöhung der Verkehrssicherheit von Kleintransportern in den zurückliegenden Jahren und auch solche Maßnahmen, die zukünftig geplant sind, umfassend zu erheben. Für solche Maßnahmen, die bereits realisiert worden sind, sollte festgestellt werden, inwiefern und in welchem Maße sie Anwendung finden. Die Grundlage des Forschungsvorhabens bildeten neben einer Literaturrecherche insbesondere empirische Untersuchungen. Diese wurden in Form von mündlich-persönlichen Befragungen mit Fahrern, Maßnahmenträgern, Unternehmen, Fahrzeugherstellern und Vermietunternehmen geführt. Insgesamt konnten im Rahmen des Vorhabens 116 Personen befragt werden. Wie die Fahrerbefragung gezeigt hat, verfügen die Befragten im Allgemeinen über keine spezifische Qualifikation in Bezug auf das Führen eines Kleintransporters. Die Ausgangsbasis bildet in aller Regel die Fahrerlaubnis der Klasse B bzw. Klasse 3 (alt). In den vergangenen fünf Jahren hat lediglich jeder zweite Fahrer eine Schulung besucht. Mit einem Anteil von rund 40% sind Übertretungen von Verkehrsvorschriften durch zu schnelles Fahren der häufigste Grund von Beanstandungen. Weitere Defizite wurden in Zusammenhang mit dem Thema Ladungssicherung deutlich. Aus Sicht von Maßnahmenträgern sind die Gründe für die insgesamt geringe Teilnahme von Fahrern an Weiterbildungsmaßnahmen unterschiedlich. So ist festzustellen, dass im Bereich des Kurier-, Express und Post/Paketdienstes aufgrund der engen Einbindung des Fahrpersonals in den logistischen Leistungsprozess häufig keine Freiräume bleiben, dem Fahrpersonal eine Schulung zu ermöglichen. Hinzu kommen wirtschaftliche Zwänge der Branche. Dennoch werden von Unternehmen des Kurier-, Express- und Post/Paketdienstes verschiedene Seminare angeboten und durchgeführt. Es hat sich gezeigt, dass vor allem der Ladungssicherung ein besonderer Stellenwert beigemessen wird. Hier sehen die Unternehmen einen wichtigen Ansatzpunkt für Verbesserungsmaßnahmen, wobei es hier in erster Linie um die Senkung der Schadensquote bezogen auf das Packstück geht, d.h. die Vermeidung bzw. Senkung von Kundenreklamationen, und weniger um den Aspekt der Verkehrssicherheit. Auch im Handwerk sind Maßnahmen zur Verbesserung der Verkehrssicherheit von Kleintransportern in Angriff zu nehmen. Die Fahrzeugsicherheit ist aus Sicht der Hersteller von zentraler Bedeutung. So hat sich die sicherheitsbezogene Ausstattung der Kleintransporter in den vergangenen Jahren stetig verbessert. Kleintransporter verfügen heute bereits serienmäßig über eine Vielzahl an allgemeinen sicherheitsbezogenen Ausstattungskomponenten. In Bezug auf die laderaumbezogene Sicherheitsausstattung werden insbesondere kundenspezifische Wünsche berücksichtigt. Auch die Durchführung von Kundenschulungen ist für die Hersteller ein wichtiges Anliegen. Betrachtet man die Zahlungsbereitschaft der Kunden, so hat sich gezeigt, dass in vielen Fällen die Kunden allerdings nicht bereit sind, für die fahrzeugspezifische Verkehrssicherheit einen höheren Kaufpreis zu entrichten. Ungeachtet dessen wird sich nach Einschätzung der Fahrzeughersteller die Verkehrssicherheit in Zukunft durch neue technische Lösungen weiter erhöhen. Aus Sicht der Vermietunternehmen hat sich die aktive und passive Sicherheitsausstattung der Kleintransporter in den vergangenen 10 Jahren stark verbessert, was sich zum Teil auch auf die Kaufentscheidung der Vermietunternehmen ausgewirkt hat. So sind bspw. bei der Kaufentscheidung neben den Anschaffungskosten durchaus Attribute wie Fahrzeugsicherheit und Langlebigkeit von zunehmender Bedeutung. Als problematisch wird das Privatkundengeschäft eingestuft. Für diesen Personenkreis ist die sicherheitsbezogene Ausstattung von Kleintransportern bislang ohne Bedeutung. Eine Verbesserung der Verkehrssicherheit von Kleintransportern ist in Zukunft nur dann zu erreichen, wenn allen Akteuren bewusst wird, dass das Fahren mit einem Kleintransporter nicht unmittelbar vergleichbar ist mit dem Fahren eines Pkw. Insgesamt ist festzustellen, dass Maßnahmen zur Verbesserung der Verkehrssicherheit von Kleintransportern langfristig anzulegen sind und insbesondere auf Ebene des Fahrpersonals noch ein erheblicher Nachholbedarf zu verzeichnen ist.
Nutzfahrzeuge der Kategorie N1 sind Fahrzeuge mit einem maximalen zulässigen Gesamtgewicht (zGG) bis zu 3500 kg. Da für diese Fahrzeuge keine Geschwindigkeitsbegrenzung und Fahrzeiterfassung vorgeschrieben ist, sind diese Fahrzeuge sehr häufig in Unfälle involviert. Durch den großen Laderaum und die hierdurch mögliche hohe Schwerpunktlage sind die Fahrer hinsichtlich der Adaption an die Beladungszustände häufig überfordert. Um den Einfluss der Fahrdynamikregelung auf die Sicherheit von N1 Fahrzeugen aufzuzeigen wurden standardisierte Fahrmanöver mit und ohne ESP bei unterschiedlichen Beladungszuständen durchgeführt. Hierfür wurde ein Fahrzeug mit einer Stütz- und Beladungsvorrichtung sowie mit der notwendigen Sensorik zur Erfassung fahrdynamischer Kennwerte und der Bremsdrücke ausgestattet. Die Auswertung der fahrdynamischen Kenngrößen zeigte deutlich den Beladungseinfluss auf die Fahrdynamik und die Minimierung dieses Einflusses durch ein ESP System mit der Mehrwertfunktion Load Adaptiv Control. Da N1-Fahrzeuge häufig auch von wenig erfahrenen Fahrern, z. B. Ferienjobs, im Straßenverkehr bewegt werden, sollten im Rahmen dieser Studie auch Fahrversuche mit ungeübten Probanden am Fahrsimulator berücksichtigt werden, um das Sicherheitspotential des ESP für die normale Fahrerpopulation aufzuzeigen. Hierzu wurde ein echtzeitfähiges Simulationsmodell eines Sprinters in CarSim erstellt und mit den Ergebnissen der Realfahrten validiert. Die Versuche am Fahrsimulator sollten das Sicherheitspotential des ESP bei der durchschnittlichen Fahrerpopulation aufzeigen. Hierzu wurden sowohl die im Realversuch durchgeführten standardisierten Fahrmanöver als auch Szenarien wie Ausweichmanöver, Teststreckenfahrt etc. nachgebildet. Insbesondere bei plötzlich auftauchenden Hindernissen hat sich der Vorteil des ESP deutlich gezeigt. Auch die Vorteile der Lasterkennung für das Regelverhalten des ESP wurde nachgewiesen.