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- Zusammensetzung (14)
- Österreich (14)
- Überholen (14)
- Achslast (13)
- Animal (13)
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- Cycle track (13)
- Einfahrt (13)
- Elektrofahrzeug (13)
- Epoxidharz (13)
- Evenness (13)
- Frankreich (13)
- Frequency (13)
- Gesetzesdurchführung (13)
- Impact test (13)
- Industrierückstand (13)
- Innenstadt (13)
- Kunstharz (13)
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- Digitale Bildverarbeitung (12)
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- Adaptation (psychol) (11)
- Ankündigung (11)
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- Geschichte (10)
- Gesundheit (10)
- Halswirbel (10)
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Das vorliegende Forschungsprojekt (FE 89.0288/2013) hatte zur Aufgabe, die Eignung verschiedener Systeme zur flächendeckenden Verdichtungskontrolle beim Einbau von Schichten in Asphaltbauweise zu untersuchen. Auf einer Versuchsstrecke zwischen Pirmasens und Landau wurden hierzu insgesamt 5 Testfelder mit einer Länge von jeweils 1 km angelegt und unter Anwendung herstellerspezifischer Kontrollsysteme verdichtet. Ein Feld diente dabei als Referenz, in dem keine flächendeckende Verdichtungskontrolle vollzogen wurde. Alle zur Beurteilung des Verdichtungserfolgs notwendigen Randparameter wurden kontinuierlich aufgezeichnet und anschließend ausgewertet. Hierzu zählten beispielsweise die Temperatur des Mischguts und der Luft, aber auch die durch Kameraaufnahmen dokumentierten tatsächlichen Walzüberfahrten in jedem Abschnitt. Zusätzlich wurden im Nachgang umfangreiche Kontrollprüfungen und Druck-Schwellversuche zur Bewertung der erreichten Verdichtung durchgeführt. Zusammenfassend lassen sich aus den Ergebnissen des Forschungsprojekts folgende Erkenntnisse gewinnen: - Zwischen dem Referenzfeld und den Feldern mit flächendeckender Verdichtungskontrolle konnten keine gravierenden Abweichungen der erreichten Verdichtungsgrade festgestellt werden. - Die Streuungen der Verdichtungsgrade in den jeweiligen Testfeldern weisen keine signifikanten Unterschiede auf. Die erreichten Verdichtungsgrade werden bei Verwendung von Verdichtungskontrollsystemen mit weniger Walzübergangszahlen erreicht. - Bei Verwendung von Verdichtungskontrollsystemen stellen sich eine homogenere Verteilung von Walzübergängen und damit eine gleichmäßigere Flächenverdichtung ein. Insgesamt konnte dem Einsatz von Systemen zur flächendeckenden Verdichtungskontrolle ein positiver Effekt auf den erreichten Verdichtungserfolg nachgewiesen werden.
Bereits vor rund zwanzig Jahren wurde die Entwicklung einer bundeslandübergreifenden Erhaltungsstrategie für Verkehrsflächen und Ingenieurbauwerke auf Netzebene angegangen. Zwischenzeitlich sind hierfür Erfassungs- und Bewertungsverfahren erarbeitet worden und in Betrieb. Aufbauend auf den guten Erfahrungen, die mit den bestehenden Managementsystemen gemacht wurden, erscheint es somit folgerichtig für die bislang vernachlässigten sonstigen Anlagenteile der Straße ein eigenständiges Asset Management zu entwickeln. Um die hierfür notwendige Datengrundlage zu schaffen, wurde in dem vorliegenden Forschungsprojekt mittels Literaturrecherche und bundesweiter Befragung von Verantwortlichen Erhaltungskostensätze, Nutzungsdauern sowie Ausstattungsquoten für die sonstigen Anlagenteile " beispielsweise Lichtsignalanlagen oder Schutzeinrichtungen " erhoben. Die Ergebnisse der Umfrage fußten in der Festlegung von für ein Asset Management relevanten sonstigen Anlagenteile sowie einer Untergliederung dieser in einzelne Aggregate. An den jeweiligen Anlagenteilen/Aggregaten konnten dann Leistungen der Instandhaltung, Instandsetzung und Erneuerung definiert werden, die in Kombination mit den Nutzungsdauern und den Ausstattungsquoten eine Kalkulation der benötigten finanziellen Aufwendungen für die Erhaltung der sonstigen Anlagenteile ermöglichen. Weiterer Forschungsbedarf besteht von allem bei der Verbesserung und Verdichtung der Datengrundlage sowie die Umsetzung in einem Computer-Programm nach dem Prinzip des PMS und BMS.
Die Ermittlung einer voraussichtlichen Restnutzungsdauer von Verkehrsbefestigungen und somit der Abschätzung des Eingreifzeitpunkts für eine grundhafte Erneuerung ist ohne die Kenntnis der strukturellen Substanz nur sehr unzureichend zu bewerkstelligen. Mit Vorliegen des Entwurfs zu den "Richtlinien zur Bewertung der strukturellen Substanz des Oberbaus von Verkehrsflächen in Asphaltbauweise" (RSO Asphalt) ist zwar ein hierfuer nutzbares Verfahren verfügbar, allerdings basiert dieses auf der Analyse von Laborversuchen an den aus Streckenabschnitten zu entnehmenden Bohrkernen, wodurch eine netzweite Anwendung nicht praktikabel ist. Um trotzdem einen umfassenden Einsatz zu ermöglichen und eine deutliche Verbesserung gegenüber bisherigen Verfahren herbeizufuehren, können aber begründete Annahmen zu den Materialkennwerten getroffen werden. Alle weiteren Eingangsdaten des Verfahrens decken sich mit denen des bisherigen. Deren Vollständigkeit und Plausibilität muss zukünftig mehr Bedeutung zugemessen werden.
Der Erhaltungsstau der deutschen Verkehrsinfrastruktur hat mittlerweile ein Maß erreicht, das zu spürbaren Problemen im Reise- und Güterverkehr führt. Insbesondere der Zustand der Brücken und der der Straßen im nachgeordneten Netz ist offensichtlich nicht mehr als gut zu bezeichnen. Die Politik hat nach vielen Jahren, in denen die Schwerpunkte des Handelns und Investierens in anderen Bereichen gesehen wurden, nunmehr reagiert und stellt deutlich mehr Finanzen zur Verbesserung der Verkehrsinfrastruktur zur Verfügung. Dies zum Anlass zu nehmen, schlicht die baulichen Aktivitäten erheblich zu intensivieren, führt jedoch zu weiteren gravierenden Beeinträchtigungen der Verfügbarkeit des Verkehrsnetzes. Gefragt sind Anstrengungen, die zu einer Verbesserung der Qualitäten im Straßenbau und damit zu einer Verlängerung der Nutzungsdauern von Schichten und ganzen Befestigungen beitragen, um langfristig eine Reduktion der Beeinträchtigungen für den Verkehr zu erwirken.
Das in den vergangenen Jahrzehnten zu beobachtende und auch für die Zukunft anzunehmende Wachstum der Gütertransportleistung auf den Bundesfernstraßen sowie die allmähliche Einführung von Funktionsbauverträgen, die dem ausführenden Bauunternehmen die Verantwortung für sein Bauwerk über Jahrzehnte in die Hand geben, lässt die Frage nach der Nutzungsdauer von Straßenbefestigungen zunehmend in den Vordergrund treten. Für die Oberbauweisen aus Asphalt werden zur Ermittlung eines Substanzwertes, auf dessen Basis gleichfalls eine Bemessung wie auch eine Restwertbestimmung durchführbar sein soll, zum einen analytische Berechnungsverfahren, zum anderen Verfahren, in denen Ergebnisse aus Ermüdungsversuchen vergleichend bewertet werden, verfolgt. Letzteres Verfahren, das vorrangig für die Bestimmung der Restsubstanz einer bereits langjährig unter Verkehr liegenden Asphaltbefestigung angewendet werden soll, wird im Folgenden vorgestellt.
Die Ermittlung einer voraussichtlichen Restnutzungsdauer von Verkehrsbefestigungen und somit der Abschätzung des Eingreifzeitpunktes für eine grundhafte Erneuerung ist ohne die Kenntnis der strukturellen Substanz nur sehr unzureichend zu bewerkstelligen. Mit Vorliegen des Entwurfes zu den "Richtlinien zur Bewertung der strukturellen Substanz des Oberbaus von Verkehrsflächen in Asphaltbauweise" (RSO Asphalt) ist zwar ein hierfür nutzbares Verfahren verfügbar, allerdings basiert dieses auf der Analyse von Laborversuchen an den aus Streckenabschnitten zu entnehmenden Bohrkernen, wodurch eine netzweite Anwendung nicht praktikabel ist. Um trotzdem einen umfassenden Einsatz zu ermöglichen und eine deutliche Verbesserung gegenüber bisherigen Verfahren herbeizuführen, können aber begründete Annahmen zu den Materialkennwerten getroffen werden. Alle weiteren Eingangsdaten des Verfahrens decken sich mit denen des bisherigen. Deren Vollständigkeit und Plausibilität muss zukünftig mehr Bedeutung zugemessen werden.
Der Autor beleuchtet die aktuelle Situation am Arbeitsmarkt und die universitäre Ausbildung. Zum einen stehen, da 45% der Bauingenieure älter als 50 Jahre sind, Unternehmen und der öffentliche Dienst im Wettbewerb um gut ausgebildete Absolventen. Zum anderen müssen Ausbildungsinhalte und der Ausbildungsstandard (Bachelor/Master) Schritt halten mit den anspruchsvoller werdenden Tätigkeiten. Erfordernisse, um die Attraktivität des Berufs des Straßenbauingenieurs zu verdeutlichen, werden aufgezeigt.
Test and assessment procedures for passive pedestrian protection of passenger cars are in place for many years within world-wide regulations as well as consumer test programmes. Nevertheless, recent accident investigations show a stagnation of pedestrian fatality numbers on European roads alongside increasing injury severities for older road users. The EU-funded SENIORS (Safety ENhancing Innovations for Older Road userS) project developed and evaluated a thorax injury prediction tool (TIPT) for later incorporation within test and assessment procedures. Accident data indicates an increasing portion of AIS2 and AIS3+ thoracic injuries of older pedestrians and cyclists which are currently not assessed in any test procedure for vulnerable road users. Therefore, SENIORS focused on the development of a test tool predicting the risk of rib fractures of vulnerable road users (VRU). While injury risk functions were reanalyzed, human body model (HBM) simulations against categorized generic vehicle frontends served as input for the definition of test setups and corresponding impact parameters. TIPT component tests against a generic frontend and an actual vehicle were used for the evaluation of the technical feasibility. The TIPT component tests shows the general feasibility of a test procedure for the assessment of thoracic injuries, with good repeatability and reproducibility of kinematics and results. Impact parameters such as the inclination angles of the thorax, angles of the velocity vector and impact speeds well replicate the parameters gained from the HBM simulations. The proposed markup and assessment scheme offers the possibility of a homogeneous evaluation of the protection potential of vehicle frontends while maintaining justifiable testing efforts. During evaluation testing, the proposed requirements were entirely met. The developed prototype of TIPT and launching system offer impact angles and speeds as suggested by HBM simulations. However, since thorax impacts during pedestrian accidents do not occur perpendicularly to the vehicle surface in most cases, the TIPT built-in linear potentiometers do not acquire the true resultant intrusions on the ribcage and thus, TIPT rib deflections do not reflect the actual human injury risk. However; for the impact forward to the bonnet leading edge, the TIPT seems applicable without further modifications. The test and assessment procedures using the TIPT offer for the first time the possibility of replicating the kinematics of a pedestrian thorax with a component test. The developed assessment scheme gives a first indication on how the risk for thoracic injuries could be implemented within the Euro NCAP Box 3 assessment. Future development of the TIPT may focus on implementing a rib cage that can deflect in all axes in a humanlike way.
Since the beginning of the testing activities related to passive pedestrian safety, the width of the test area being assessed regarding its protection level for the lower extremities of vulnerable road users has been determined by geometrical measurements at the outer contour of the vehicle. During the past years, the trend of a decreased width of the lower extremity test and assessment area realized by special features of the outer vehicle frontend design could be observed. This study discusses different possibilities for counteracting this development and thus finding a robust definition for this area including all structures with high injury risk for the lower extremities of vulnerable road users in the event of a collision with a motor vehicle. While Euro NCAP is addressing the described problem by defining a test area under consideration of the stiff structures underneath the bumper fascia, a detailed study was carried out on behalf of the European Commission, aiming at a robust, worldwide harmonized definition of the bumper test area for legislation, taking into account the specific requirements of different certification procedures of the contracting parties of the UN/ECE agreements from 1958 and 1998. This paper details the work undertaken by BASt, also serving as a contribution to the TF-BTA of the UN/ECE GRSP, towards a harmonized test area in order to better protect the lower extremities of vulnerable road users. The German In-Depth Accident Database GIDAS is studied with respect to the potential benefit of a revised test area. Several practical options are discussed and applied to actual vehicles, investigating the differences and possible effects. Tests are carried out and the results studied in detail. Finally, a proposal for a feasible definition is given and a suggestion is made for solving possible open issues at angled surfaces due to rotation of the impactor. The study shows that, in principle, there is a need for the entire vehicle width being assessed with regard to the protection potential for lower extremities of vulnerable road users. It gives evidence on the necessity for a robust definition of the lower extremity test area including stiff and thus injurious structures at the vehicle frontend, especially underneath the bumper fascia. The legal definition of the lower extremity test area will shortly be almost harmonized with the robust Euro NCAP requirements, as already endorsed by GRSP, taking into account injurious structures and thus contributing to the enhanced protection of vulnerable road users. After finalization of the development of a torso mass for the flexible pedestrian legform impactor (FlexPLI) it is recommended to consider again the additional benefit of assessing the entire vehicle width.
A biofidelic flexible pedestrian legform impactor (FlexPLI) has been developed from the year 2000 onwards and evaluated by a technical evaluation group (Flex-TEG) of UN-ECE GRSP. A recently established UN-ECE GRSP Informal Group on GTR9 Phase 2 is aiming at introducing the FlexPLI within world-wide regulations on pedestrian safety (Phase 2 of GTR No. 9 as well as the new UN regulation 127 on pedestrian safety) as a test tool for the assessment of lower extremity injuries in lateral vehicle-to-pedestrian accidents. Besides, the FlexPLI has already been introduced within JNCAP and is on the Euro NCAP roadmap for 2014. Despite of the biofidelic properties in the knee and tibia sections, several open issues related to the FlexPLI, like the estimation of the cost benefit, the feasibility of vehicle compliance with the threshold values, the robustness of the impactor and of the test results, the comparability between prototype and production level and the finalization of certification corridors still needed to be solved. Furthermore, discussions with stakeholders about a harmonized lower legform to bumper test area are still going on. This paper describes several studies carried out by the Federal Highway Research Institute (BASt) regarding the benefit due to the introduction of the FlexPLI within legislation for type approval, the robustness of test results, the establishment of new assembly certification corridors and a proposal for a harmonized legform to bumper test area. Furthermore, a report on vehicle tests that previously had been carried out with three prototype legforms and were now being repeated using legforms with serial production status, is given. Finally, the paper gives a status report on the ongoing simulation and testing activities with respect to the development and evaluation of an improved test procedure with upper body mass for assessing pedestrian femur injuries.
Test and assessment procedures for passive pedestrian protection based on developments by the European Enhanced Vehicle-safety Committee (EEVC) have been introduced in world-wide regulations and consumer test programmes, with considerable harmonization between these programmes. Nevertheless, latest accident investigations reveal a stagnation of pedestrian fatality numbers on European roads running the risk of not meeting the European Union- goal of halving the number of road fatalities by the year 2020. The branch of external road user safety within the EC-funded research project SENIORS under the HORIZON 2020 framework programme focuses on investigating the benefit of modifications to pedestrian test and assessment procedures and their impactors for vulnerable road users with focus on the elderly. Injury patterns of pedestrians and cyclists derived from the German In-Depth Accident Study (GIDAS) show a trend of AIS 2+ and AIS 3+ injuries getting more relevant for the thorax region in crashes with newer cars (Wisch et al., 2017), while maintaining the relevance for head and lower extremities. Several crash databases from Europe such as GIDAS and the Swedish Traffic Accident Data Acquisition (STRADA) also show that head, thorax and lower extremities are the key affected body regions not only for the average population but in particular for the elderly. Therefore, the SENIORS project is focusing on an improvement of currently available impactors and procedures in terms of biofidelity and injury assessment ability towards a better protection of the affected body regions, incorporating previous results from FP 6 project APROSYS and subsequent studies carried out by BASt. The paper describes the overall methodology to develop revised FE impactor models. Matched human body model and impactor simulations against generic test rigs provide transfer functions that will be used for the derivation of impactor criteria from human injury risk functions for the affected body regions. In a later step, the refined impactors will be validated by simulations against actual vehicle front-ends. Prototyping and adaptation of test and assessment procedures as well as an impact assessment will conclude the work of the project at the final stage. The work will contribute to an improved protection of vulnerable road users focusing on the elderly. The use of advanced human body models to develop applicable assessment criteria for the revised impactors is intended to cope with the paucity of actual biomechanical data focusing on elderly pedestrians. In order to achieve optimized results in the future, the improved test methods need to be implemented within an integrated approach, combining active with passive safety measures. In order to address the developments in road accidents and injury patterns of vulnerable road users, established test and assessment procedures need to be continuously verified and, where needed, to be revised. The demographic change as well as changes in the vehicle fleet, leading to a variation of accident scenarios, injury frequencies and injury patterns of vulnerable road users are addressed by the work provided by the SENIORS project, introducing updated impactors for pedestrian test and assessment procedures.
Anhand von zwei verschiedenen Versuchskonfigurationen wurde das Schutzpotential von Kopfschutzsystemen (Fahrradhelm und airbagbasiertes System) untersucht. Hierbei wurden die resultierende Kopfbeschleunigung als Messwert sowie das Kopfverletzungskriterium HIC bei Versuchen ohne und mit Kopfschutzsystem vergleichend gegenübergestellt.
A legform impactor with biofidelic characteristics (FlexPLI) which is being developed by the Japanese Automobile Research Institute (JARI) is being considered as a test tool for legislation within a proposed Global Technical Regulation on pedestrian protection (UNECE, 2006) and therefore being evaluated by the Technical Evaluation Group (TEG) of GRSP. In previous built levels it already showed good test results on real cars as well as under idealised test conditions but also revealed further need for improvement. A research study at the Federal Highway Research Institute (BASt) deals with the question on how leg injury risks of modern car fronts can be revealed, reflected and assessed by the FlexPLI and how the impactor can be used and implemented as a legislative instrument for the type approval of cars according to current and future legislations on pedestrian protection. The latest impactor built level (GTα ) is being evaluated by a general review and assessment of the certification procedure, the knee joint biofidelity and the currently proposed injury criteria. Furthermore, the usability, robustness and durability as a test tool for legislation is examined and an assessment of leg injuries is made by a series of tests with the FlexPLI on real cars with modern car front shapes as well as under idealised test conditions. Finally, a comparison is made between the FlexPLI and the current european legislation tool, the legform impactor according to EEVC WG 17.
Supported by field accident data and monitoring results of European Regulation (EC) No. 78/2009, recent plans of the European Commission regarding a way forward to improve passive safety of vulnerable road users include, amongst other things, an extension of the head test area. The inclusion of passive cyclist safety is also being considered by Euro NCAP. Although passenger car to cyclist collisions are often severe and have a significant share within the accident statistics, cyclists are neither considered sufficiently in the legislative nor in the consumer ratings tests. Therefore, a test procedure to assess the protection potential of vehicle fronts in a collision with cyclists has been developed within a current research project. For this purpose, the existing pedestrian head impact test procedures were modified in order to include boundary conditions relevant for cyclists as the second big group of vulnerable road users. Based on an in-depth analysis of passenger car to cyclist accidents in Germany the three most representative accident constellations have been initially defined. The development of the test procedure itself was based on corresponding simulations with representative vehicle and bicycle models. In addition to different cyclist heights, reaching from a 6-year-old child to a 95%-male, also four pedal positions were considered. By reconstruction of a real accident the defined simulation parameters could be validated in advance. The conducted accident kinematics analysis shows for a large portion of the constellations an increased head impact area, which can reach beyond the roof leading edge, as well as high average values for head impact velocity and angle. Based on the simulation data obtained for the different vehicle models, cyclist-specific test parameters for impactor tests have been derived, which have been further examined in the course of head and leg impact tests. In order to study the cyclist accident kinematics under real test conditions, different full scale tests with a Polar-II dummy positioned on a bicycle have been conducted. Overall, the tests showed a good correlation with the simulations and support the defined boundary test conditions. Typical accident scenarios and simulations reveal higher head impact locations, angles and velocities. An extended head impact area with modified test parameters will contribute to an improved protection of vulnerable road users including cyclists. However, due to significantly differing impact kinematics and postures between the lower extremities of pedestrians and cyclists, these injuries cannot be addressed by the means of current test tools such as the flexible pedestrian legform impactor FlexPLI. Based on the findings obtained within the project as well as the existing pedestrian protection requirements a cyclist protection test procedure for use in legislation and consumer test programmes has been developed, whose requirements have been transferred into a corresponding test specification. This specification provides common head test boundary conditions for pedestrians and cyclists, whereby the existing requirements are modified and two parallel test procedures are avoided.
During the past five years, a Euro NCAP technical working group on pedestrian safety has been working on improving test and assessment procedures for enhanced passive pedestrian safety. After harmonizing the tools and procedures as much as possible with legislation, the work was mainly focused on the development of grid procedures for the pedestrian body regions head, upper leg with pelvis and lower leg with knee. Furthermore, the test parameters for the head and the upper leg were revised, a new lower legform impactor was introduced and the injury thresholds were adjusted or, where necessary, the injury criteria were changed. Finally, the assessment limits and colour scheme were refined, widening the range and adding two more colours in order to provide a more detailed description of the pedestrian safety performance. By abstaining from an assessment based on a worst point selection philosophy, the improved test point determination procedures that were introduced during the years 2013 and 2014 give a more homogeneous, high resolution picture of the pedestrian safety performance of the vehicle frontends. By using a uniform grid for each test zone approximately 200 test points, evenly distributed within each area, can now be assessed per vehicle. The introduction of the flexible pedestrian legform impactor in 2014 enables a more realistic injury prediction of the knee and the tibia using a biofidelic test tool. With the new upper legform test that has been launched in 2015 the assessment in that area is now focusing on the injured body region instead of the injury causing vehicle part and thus is aligned with the approach in the remaining body regions head and lower leg. At the same time, a monitoring test with the headform impactor against the bonnet leading edge is closing the possible gap between the test areas to identify injury causing vehicle parts that moved out of focus due to the introduction of the new upper legform test. The paper describes the new test and assessment procedures with their underlying philosophy and gives an outlook in terms of open issues, specifying the needs for further improvement in the future. In parallel to the work of the pedestrian subgroup, a Euro NCAP working group on heavy vehicles introduced a set of protocol changes in 2011 that were related to the assessment of M1 vehicles derived from commercial vehicles, with a gross vehicle weight between 2.5 and 3.5 tons and 8 or 9 seats. The paper also investigates the applicability of the new pedestrian test and assessment procedures to heavy vehicles.
A flexible pedestrian legform impactor (FlexPLI) with biofidelic characteristics is aimed to be implemented within global legislation on pedestrian protection. Therefore, it is being evaluated by a technical evaluation group (Flex-TEG) of GRSP with respect to its biofidelity, robustness, durability, usability and protection level (Zander, 2008). Previous studies at the Federal Highway Research Institute (BASt) and other laboratories already showed good progress concerning the general development, but also the need for further improvement and further research in various areas. An overview is provided of the different levels of development and all kinds of evaluation activities of the Flex-TEG, starting with the Polar II full scale pedestrian dummy as its origin and ending up with the latest legform impactor built level GTR that is expected to be finalized by the end of the year 2009. Using the latest built levels as a basis, gaps are revealed that should be closed by future developments, like the usage of an upper body mass (UBM), the validation of the femur loads, injury risk functions for the cruciate knee ligaments and an appropriate certification method. A recent study on an additional upper body mass being applied for the first time to the Flex-GT is used as means of validation of recently proposed modified impact conditions. Therefore, two test series on a modern vehicle front using an impactor with and without upper body mass are compared. A test series with the Flex-GTR will be used to study both the comparability of the impact behavior of the GT and GTR built level as well as the consistency of test results. Recommendations for implementation within legislation on pedestrian protection are made.
A flexible pedestrian legform impactor (FlexPLI) has been evaluated by a Technical Evaluation Group (Flex-TEG) of the Working Party on Passive Safety (GRSP) of the United Nations Economic Commission for Europe (UN-ECE). It will be implemented within phase 2 of the global technical regulation (GTR 9) as well as within a new ECE regulation on pedestrian safety as a test tool for the assessment of lower extremity injuries in lateral vehicle-to-pedestrian accidents (UN-ECE 2010-1, 2010-2 and 2010-3). Due to its biofidelic properties in the knee and tibia section, the FlexPLI is found to having an improved knee and tibia injury assessment ability when being compared to the current legislative test tool, the lower legform impactor developed by the Pedestrian Safety Working Group of the European Enhanced Vehicle-safety Committee (EEVC WG 17). However, due to a lack of biofidelity in terms of kinematics and loadings in the femur part of the FlexPLI, an appropriate assessment of femur injuries is still outstanding. The study described in this paper is aimed to close this gap. Impactor tests with the FlexPLI at different impact heights on three vehicle frontends with Sedan, SUV and FFV shape are performed and compared to tests with a modified FlexPLI with upper body mass. Full scale validation tests using a modified crash test dummy with attached FlexPLI that are carried out for the first time prove the more humanlike responses of the femur section with applied upper body mass. Apart from that they also show that the impact conditions described in the current technical provisions for tests with the FlexPLI don"t necessarily compensate the missing torso mass in terms of knee and tibia loadings either. Therefore it can be concluded that an applied upper body mass will contribute to a more biofidelic overall behavior of the legform and subsequently an improved injury assessment ability of all lower extremity injuries addressed by the FlexPLI. Nevertheless, the validity of the original as well as the modified legform for tests against vehicles with extraordinary high bumpers as well as flat front vehicles still needs to be evaluated in detail. A first clue is given by the application of an additional accelerometer to the legform.
Recent accident statistics from the German national database state bicyclists being the second endangered group of vulnerable road users besides pedestrians. With 399 fatalities, more than 14.000 seriously injured and more than 61.000 slightly injured persons on german roads in the year 2011, the group of bicyclists is ranked second of all road user groups (Statistisches Bundesamt, 2012). While the overall bicycle helmet usage frequency in Germany is very low, evidence is given that its usage leads to a significant reduction of severe head injuries. After an estimation of the benefit of bicycle helmet usage as well as an appropriate test procedure for bicyclists, this paper describes two different approaches for the improvement of bicyclist safety. While the first one is focusing on the assessment of the vehicle based protection potential for bicyclists, the second one is concentrating on the safety assessment of bicycle helmets. Within the first part of the study the possible revision of the existing pedestrian testing protocols is being examined, using in depth accident data, full scale simulation and hardware testing. Within the second part of the study, the results of tests according to supplemental test procedures for the safety assessment of bicycle helmets developed by the German Federal Highway Research Institute (BASt) are presented. An additional full scale test performed at reduced impact speed proves that measures of active vehicle safety as e.g. braking before the collision event do not necessarily always lead to a reduction of injury severity.
Das Forschungsprojekt hat untersucht, welche Geschäftsmodelle von und welche Kooperationsformen mit Social Media Influencer:innen (SMI) sich für die Verkehrssicherheitsarbeit eignen. Aufbauend auf vorherigen Forschungsprojekten der BASt und einer strukturierten Literaturanalyse internationaler, peer-reviewter Literatur wurde der derzeitige Kenntnisstand zu Geschäftsmodellen und Formen der Kooperation aufgearbeitet. Als zentrale Themenaspekte wurden im Bereich der Geschäftsmodelle die Produktion von Inhalten und der Online-Persona, Interaktion, Distributionsplanung und Wahl des Erlösmodells ausgemacht. Kooperationen können je nach SMI und Kampagnenzielen in Tiefe, Umfang und Dauer variieren. Verschiedene Faktoren beeinflussen die Durchführung maßgeblich, u.a. das Briefing, die Qualitätskontrolle während der Kooperation und die Messung des Erfolgs. Die Erkenntnisse wurden dann durch Interviews mit Branchenexpert:innen verschiedener Akteursgruppen (Auftraggeber aus dem Non-Profit-Bereich, SMI, SMI-Agenturen) mit Blick auf die Anforderungen der Verkehrssicherheitskommunikation präzisiert und um einen Praxisblick erweitert. Den Abschluss des Forschungsprojekts bildete ein Co-Creation-Workshop mit Vertreter:innen aller relevanten Stakeholder-Gruppen, der weitergehende Ansätze in der Kooperation von Verkehrssicherheitsträgern und SMIs entwickelte. Abschließend lassen sich mehrere Handlungsempfehlungen für Träger der Verkehrssicherheitsarbeit für die Kooperation mit SMIs ableiten, u.a. hinsichtlich der Ausgestaltung von Incentivierungen der SMIs und der begrenzten Rolle eines Reputationstransfers, der Bedeutsamkeit von einer reibungslosen Ausgestaltung der Kooperation, dem Hinweis auf höhere Aufwendungen bei der Auswahl bei Non-Profit-Kampagnen, der Relevanz langfristiger Influencer Relations, der Rolle von Agenturen als Mittler und schließlich der Anforderungen mit Blick auf Corporate Influencing. Schließlich wurden weitere Forschungsbedarfe skizziert.
Beijing, mit 11,4 Millionen Einwohnern, 563.690 Kraftfahrzeugen einschließlich der motorisierten Zweiräder aller Art, 7,4 Millionen Fahrrädern, 5.213 Bussen und einer U-Bahn-Linie, ist nicht nur eine alte, traditionsreiche Kaiserstadt im Herzen Chinas, sondern auch eine aufstrebende, geschäftige Millionenstadt Asiens, die von Tag zu Tag, dem wirtschaftlichen Aufschwung folgend, sich städtebaulich und verkehrlich wandelt. Trotz vielfältiger Umweltprobleme wird der Zuwachs an Mobilität positiv bewertet; dem tragen die Verantwortlichen Rechnung durch Ausbau der Infrastruktur sowohl des ÖPNV als auch des Individualverkehrs. Der vorliegende Artikel beschäftigt sich mit den Entwicklungen des Stadtverkehrs und vermittelt eine detaillierte Analyse des Unfallgeschehens; heute stirbt in Beijing täglich durchschnittlich ein Mensch im Straßenverkehr.
Recently, EuroNCAP updated the upper legform test protocols. The main objective of this study is to establish the upper legform test in KIDAS (Korean In-depth Accident Study) taking into account domestic pedestrian accident data as well as anthropometric data to protect elderly pedestrians whose average height and weight is much smaller and lighter than other age groups, especially compared to Europeans. Therefore 230 cases of pedestrian accidents from KIDAS were investigated to explore the injury severity of body regions as well as age related injury patterns. Injuries of all body regions were examined, with a special focus on injuries of abdomen and pelvic area. On the other hand, in order to explore Korea's pedestrian accident environment, national police data and KIDAS (Korean In-depth Accident Study) data were compared. The results should be taken into account in future analyses and possible improvements, such as regulations and KNCAP test protocols, of the pedestrian safety policy in Korea.