The Identification of Characteristic, Cause, and Disaster Management of Traffic Accident at the Sungailiat – Belinyu Road

This study aims to identify the characteristic, cause, and disaster management of traffic accidents at the Sungailiat – Belinyu road. The research method used is descriptive quantitative. Data collection techniques is in the form of documentation and observation. The data collected then analyzed using data analysis techniques with classification methods. Based on the research done, the results obtained are the accidents that occur on Jalan Raya Sungailiat - Belinyu are the most common in Riau Silip District with a percentage of 59.8%. The accidents characteristics on Sungailiat - Belinyu road based on the time of the incident, mostly occurred during the afternoon to evening at 12.00 - 17.59 WIB and in the evening at 18.00 - 23.59 WIB. Based on the type of collision, the most common types of collisions are frontal collisions by 30% and collisions due to loss of control by 26.6%. Based on road users, road users who are most involved in accidents are motorcycles by 40%, cars by 23.3%, dump trucks by 10%, and the other vehicles in a small percentage. As for the factors causing the accident, it was found that the accident was caused by road users (73.33%), road factors (23.33%), and environmental factors (6.66%). The handling of accident management is arranged according to the causative factors that are done before, when it occurs, and after an accident occurs as an effort to reduce the risk of accidents on the Sungailiat – Belinyu road, Bangka Regency.

Method to Correct the Velocity Variation Information of an Automatic Crash Notification System in Vehicle-to-Rigid Barrier Frontal Collisions

Automatic crash notification systems (ACNSs) play a key role in post-accident safety. To improve the accuracy and efficiency of ACNSs, a method to correct the velocity variation information of ACNSs was established. First, after the acceleration data of sled crash tests were analysed, the factors affecting the accuracy of the velocity variation information were determined, and the influence of the discrimination threshold and acceleration curve shape on the velocity variation information was examined. Second, according to the acceleration data generated by the simulation model of a sled crash, the correlation between the accuracy of the velocity variation information and influencing factors was modelled. Third, an automatic crash notification algorithm involving a velocity variation correction function (VVCF) was proposed based on the correlation model. Finally, to verify its reliability, the improved algorithm was applied to an automatic crash notification system (ACNS) terminal. The validation results show that the ACNS terminal can accurately identify collisions and transmit accident information. Moreover, more accurate velocity variation information can be retrieved.

Safety as a key aspect in the creation of motor vehicles

In this article, the authors attempt to define vehicle safety. They indicate selected elements of passive safety, which in their opinion contribute to a significant reduction in injury to those involved in various road accidents. The goal is to prove the following thesis: Safety is a key aspect of vehicle design. The results obtained during frontal collisions and presented by NHTSA in twelve reports are analysed. Six of these reports are from 1993-1997, the rest are from 2011-2016. In the final part of this work the authors indicate potential ways of developing safety in vehicles. Keywords: Vehicle safety, crumple zones, passive safety

Evaluation of Automotive Hood and Bumper Performance With Composite Material by Pedestrian Impactor Systems

The quality and reliability of vehicle safety in the automotive industry has greatly improved over the last years. Automotive manufacturers are constantly investigating the potential for enhancing rigidity for passenger car components and reducing the vehicle’s weight costs. Frontal elements such as the hood and bumper are more complex to analyze during the frontal collisions for weight reduction with the same rigidity and shape design. The objective of this study is to examine the crash efficiency of a vehicle’s hood and bumper with additive composite materials for enhancement of the design. The system is evaluated with the FE upper legform and adult headform impactor sub-system models. Under EEVC WG17 regulations, finite element simulations are performed with a sedan vehicle model. Analysis of the head impact on the car hood, subsequent head acceleration and HIC values were analyzed using pedestrian impactor. Differences in simulation results are examined for steel and composite material for better material selection. To estimate the weight reduction and pedestrian protection, a comparison between the composite material and the steel material is performed for the sedan vehicle. The study, thus, examines safety issues regarding the new material Carbon fiber-reinforced plastic (CFRP) for vehicle front-end and whether it would be less safe to use during frontal collision for weight reduction and comprehension behavior on pedestrian injuries.

Analysis of the Causes of Vehicle Accidents in Poland in 2009-2019

The article presents the general characteristics of road transport safety in Poland over the years 2009-2019. The key objective of this study was to investigate the main factors of road accidents in Poland. Up till now, the number of road accidents has been analysed in detail on the basis of data on collisions from rear, side and frontal perspective. Moreover, in the article, statistics regarding the number of perpetrators of accidents by gender and age are summarized, as well as dynamics aspects of changes related to new passenger vehicles and trucks in Poland in 2009-2019 are indicated. As a result, the intensity of rear collisions rather than frontal collisions is apparent. Hence, an inconspicuous rear collision by not braking a speeding vehicle carries a risk of the upper cervical spine.

High-mass star formation in Orion possibly triggered by cloud–cloud collision. III. NGC 2068 and NGC 2071

Using the NANTEN2 Observatory, we carried out a molecular-line study of high-mass star forming regions with reflection nebulae, NGC 2068 and NGC 2071, in Orion in the $^{13}$CO($J = 2$–1) transition. The $^{13}$CO distribution shows that there are two velocity components at ${9.0}$ and ${10.5}\:$km$\:$s$^{-1}$. The blue-shifted component is in the northeast associated with NGC 2071, whereas the red-shifted component is in the southwest associated with NGC 2068. The total intensity distribution of the two clouds shows a gap of $\sim\!\! 1\:$pc, suggesting that they are detached at present. A detailed spatial comparison indicates that the two show complementary distributions. The blue-shifted component lies toward an intensity depression to the northwest of the red-shifted component, where we find that a displacement of ${0.8}\:$pc makes the two clouds fit well with each other. Furthermore, a new simulation of non-frontal collisions shows that observations from $60^\circ$ off the collisional axis agreed well with the velocity structure in this region. On the basis of these results, we hypothesize that the two components collided with each other at a projected relative velocity of ${3.0}\:$km$\:$s$^{-1}$. The timescale of the collision is estimated to be ${0.3}\:$Myr for an assumed axis of the relative motion $60^\circ$ off the line of sight. We assume that the two most massive early B-type stars in the cloud, illuminating stars of the two reflection nebulae, were formed by collisional triggering at the interfaces between the two clouds. Given the other young high-mass star-forming regions, namely, M 42, M 43, and NGC 2024 (Fukui et al. 2018a, ApJ, 859, 166; Ohama et al. 2017, arXiv:1706.05652), it seems possible that collisional triggering has been independently working to form O-type and early B-type stars in Orion in the last Myr over a projected distance of ∼80 pc.

Design of a Prevention System of Frontal Car Crashes for "SACH" Cars

According to the World Health Organization, the number of traffic accidents worldwide reaches 1.25 million people involved in them. This is one of the main causes of death of people between 15 and 29 years old. Most of these deaths are in emergent countries where the rapid economic development has occurred together with an increased use of vehicles. Apart from being a public health issue, the injuries caused by these accidents are an economic-like problem especially in low and medium income countries where their GDP shows about a 3% economical decrease. Argentine has one of the highest mortality index in the world. In 2017 there were 7.213 deaths (provisional figure obtained up to January 11, 2018). This shows a daily rate of 20 deaths and a month rate of 600 deaths. These indexes raise the need of solving this problem including about 120.000 injured people which occurred annually and the significant material losses. This project comes out with the design of a device to place in old and new cars in order to prevent frontal collisions in Argentine roads, especially in roads with only two lines. This system will first join different types of cameras and sensors operated with a software that will alert the driver in advance in various ways, for example, when a vehicle is coming frontally and the overtake is not possible. The devise could use other technologies such as chips (RID types or similar ones), GPS, laser lights and others considered appropriate to make the device more complete, effective and economically accessible.