Calculation Methodology of Geometrical Dimensions for Noise-Protective Automotive Screens

2019 ◽  
Vol 7 (3) ◽  
pp. 27-34
Author(s):  
Владимир Тупов ◽  
Vladimir Tupov ◽  
Т. Дудьев ◽  
T. Dud'ev

To determine the projected screen’s optimal dimensions has been proposed a calculation method allowing assay an automotive noise entering the area, protected by this screen. In engineering calculations the noise screen is often considered as infinitely extended, so that the sound diffraction on its side edges and the noise from the parts which are not covered by the screen are ignored. The proposed complex approach in the screens design allows assay the levels of noise emanating from the parts of transport stream, covered and uncovered by the screen. Thus, the designer, in case of exceeding the set values by the noise level, can estimate from where the loudest noise comes: from the top of the screen or from its sides, including the noise from the road traffic parts which are not covered by the screen, both from the right and left sides of it. From here is emerged the possibility to rationally vary the screen’s geometric dimensions, increasing its height, or extending it in one or another direction. As a result of such design, the screen’s optimal basic geometrical dimensions are determined in terms of providing the necessary noise level in the protected area. This allows reduce the design time and economic costs for the construction of screens.

Author(s):  
I Komang Priyanata ◽  
Cokorda Gede Alit Semarajaya ◽  
Ni Wayan Febriana Utami

Comparative study of Ciung Wanara traffic island in Gianyar with Satrya Gatotkaca traffic island In Tuban. Traffic island is an island in the middle of the road that serves to direct the flow of traffic and a waiting place for the user to cross the road. Traffic island of Ciung Wanara in Gianyar and Traffic island of Satrya Gatotkaca in Tuban had turned their function of being a place of recreation for the community. The purpose of this study is to invent existing condition of Ciung Wanara and Satrya Gatotkaca traffic island. This study also provides recommendations in the form of designs that can improve the function of the site. The method used in this research was field survey by conducting observation, distributing questioner and doing interview. Research showed that, users in Ciung Wanara traffic island were dominated by student while users who came to the traffic island Satrya Gatotkaca were dominated by employees. The selection of vegetation bettwen the traffic island of Ciung Wanara and traffic island of Satrya Gatotkaca very different. Vegetation in the traffic island of Ciung Wanara used more of large size vegetation that can block the view of the user of the vehicle, while the vegetation used in the traffic island of Satrya Gatotkaca use lower plants size. The recommendation given in both locations was to add access to traffic island of Ciung Wanara so as to make easier for users to find the right place to cross, while traffic island of Satrya Gatotkaca was arraged it crossing space for more convenient and secure for users to passed the crosswalk.


Author(s):  
Daniil A. Loktev ◽  
Alexey A. Loktev ◽  
Alexandra V. Salnikova ◽  
Anna A. Shaforostova

This study is devoted to determining the geometric, kinematic and dynamic characteristics of a vehicle. To this purpose, it is proposed to use a complex approach applying the models of deformable body mechanics for describing the oscillatory movements of a vehicle and the computer vision algorithms for processing a series of object images to determine the state parameters of a vehicle on the road. The model of the vehicle vertical oscillations is produced by means of the viscoelastic elements and the dry friction element that fully enough represent the behavior of the sprung masses. The introduced algorithms and models can be used as a part of a complex system for monitoring and controlling the road traffic. In addition, they can determine both the speed of the car and its dynamic parameters and the driving behavior of the individual drivers.


2016 ◽  
Vol 4 (2) ◽  
pp. 163
Author(s):  
MSc. Halim Kuliqi

Taking into account the fact that in the world the road traffic accidents happen very often and go up to very large numbers, which often are also very disturbing, then there is an indispensable need to study this problem, because without identifying the problem and its causes then it can neither be fought nor prevented.The significance of this paper lays on the presentation of some data regarding the number of accidents and their victims, the ways of compensation for the damage and the presentation of some measures in order to protect the victims of accidents from secondary victimization.This paper fills a scientific gap for victims of accidents and their way of compensation, which until now for the case of Kosovo has been not addressed significantly in terms of theory and practice also. For the presentation and the development of this issue have been used statistical method, comparative method and among others also the case study methods.In other words, the main purpose of this paper is to present data that expose the difficulties for the realization of the right of victims after suffering accidents and also to propose some norms that would protect the victims from secondary victimization, as victims after suffering a traffic accident may be hurt again until the realization of their demand for compensation according to the law.


Jurnal Ecopsy ◽  
2016 ◽  
Vol 2 (3) ◽  
Author(s):  
Abdi Irawan ◽  
Emma Yuniarrahmah ◽  
Hemy Heryati Anward

ABSTRAK Kenakalan berlalu lintas merupakan salah satu bentuk dari perilaku kenakalan remaja. Tujuan dari penelitian ini untuk mengetahui gambaran perilaku kenakalan berlalu lintas pada remaja di Batulicin dan faktor-faktor penyebabnya. Subjek dalam penelitian ini berjumlah tiga orang remaja laki-laki yang merupakan pelaku kenakalan berlalu lintas di wilayah Batulicin. Teknik penggalian data pada penelitian ini adalah wawancara mendalam semi terstruktur dan observasi partisipasi pasif. Hasil analisis dari ketiga subjek, diperoleh kesimpulan bahwa gambaran berbagai bentuk kenakalan berlalu lintas yaitu: Tidak memiliki SIM, tidak membawa STNK saat berkendara, tidak menggunakan plat nomor kendaraan, tidak menggunakan helm saat berkendara, tidak memakai kaca spion kanan dan kiri, menggunakan knalpot bersuara nyaring, tidak mengaktifkan fungsi speedo meter, manuver berbahaya, melakukan pelecehan verbal atau perkataan kasar pada pengendara lain, balapan liar, mengebut, menerobos lampu merah, dan berkendara dalam keadaan mabuk. Pada ketiga subjek juga ditemukan faktor yang mempengaruhi kenakalan berlalu lintas yaitu, faktor internal yang meliputi, identitas diri yang negatif, kontrol diri yang rendah, usia awal melakukan kenakalan, jenis kelamin laki-laki, kepercayaan diri rendah, kestabilan emosi kurang, aktualisasi diri terhambat, tidak memiliki model yang baik, penyesuaian sosial yang kurang, perkembangan sosial kurang, dan kurangnya kelekatan pada orang tua,faktor eksternal meliputi, pengaruh teman sebaya yang negatif, prestasi sekolah yang rendah,  status sosial ekonomi menengah kebawah, peran orang tua yang buruk dan kualitas lingkungan sekitar yang buruk. Kata Kunci : Kenakalan, Lalu lintas, Remaja ABSTRACT  Road traffic delinquency is one form of juvenile delinquency. The purpose of this study was to describe the road traffic delinquency behavior in adolescents in Batulicin and the contributing factors. Subjects in this study were three teenagers who were the perpetrators of road traffic delinquency in Batulicin. Data were gathered through semi-structured in-depth interviews and observation of passive participation. It can be concluded from the results of the  analysis that there were some various types of road traffic delinquency, namely not having a driver's license, not carrying vehicle registration when driving, not using the license plate numbers, not wearing helmets while driving, not wearing the right and left rear-view mirrors, applying loud-voiced exhaust, not activating the Speedo meter, doing dangerous maneuvers, delivering verbal harassment or vulgarity on the other riders, wild racing, speeding, running a red light, and driving in a drunken state. There were some factors found in the three subjects that affected the road traffic delinquency. The first was the internal factors that included negative self-identity, low self-control, mischief in early age, male gender, low self-esteem, less emotional stability, hampered self-actualization, lack of good models, less social adjustment, less social development, and lack of attachment to parents. The second was the external factors including negative peer influences, low school performance, middle and lower socioeconomic status, poor parental role and poor quality of the surrounding environment.  Keywords: Delinquency, Traffic, Adolescent


2018 ◽  
Vol 203 ◽  
pp. 03002
Author(s):  
Muralia Hustim ◽  
Isran M. Ramli

The motorcycle domination on heterogeneous traffic situation in many cities in developing countries including Indonesia leads to the decreasing of environment qualities such noise pollution. Regarding the road traffic noise (RTN) pollution, this paper attempts to develop an empirical model for a RTN prediction model. The model based on a motorcycle unit as reference unit to consider flow rate of the road traffic which dominated by motorcycles. The study collected the RTN data such volume of each vehicle types, i.e., motorcycle; light vehicle; and high vehicle, and the noise level on the forty arterial roads in Makassar, Indonesia. The survey methods based on the traffic count method and the measurement noise level using a video camera and a sound level meter, respectively. We collected data during ten minutes of each one-hour period of each road. The empirical relationship models between the noise level and the traffic volume based on the motorcycle unit were developed using various types of regression models. The results showed that the polynomial model is more significant than the other models. We expected that the model provides a basic RTN prediction model in order to simulate some measures of the traffic management system in reducing the RTN level in Makassar City.


2021 ◽  
Vol 13 (8) ◽  
pp. 4196
Author(s):  
Song Fang ◽  
Jianxiao Ma

There is a body of literature on the influence range and traffic risk of fixed work zones. However, relatively few studies have examined the effect of ubiquitous moving operating vehicles, such as road cleaners, on urban roads. The influence of low speed moving work zones on road traffic flow and traffic risk is still unclear. In this work, we used simulations to establish an urban expressway three lanes VISSIM model, and selected the road traffic volume and speed of the moving work zone as the independent variables. We analyzed the range of influence of the moving work zone on the rear vehicles in the left, middle and right lanes of the urban expressway and the traffic risk variation law caused by the moving work zone. The results show that the left lane was indirectly affected by the moving work zone when the traffic volume reached 2000 pcu/h. The influence of the moving work zone on the middle lane was controlled by the traffic volume and the speed of the moving work zone. Both the left and middle lanes were mainly impacted by vehicles changing lane from the right lane. Regardless of the traffic volume and the speed of the moving work zone change, the vehicles 200 m behind a moving work zone will be directly affected in the right lane. Furthermore, the average traffic risk is the highest within 50 m of the moving work zone in the right lane. When the traffic volume decreases and the speed of the moving work zone increases, the average traffic risk decreases gradually. These results provide a scientific basis for the operation and management of moving working vehicles on urban roads.


2020 ◽  
Vol 50 (4) ◽  
pp. 299-308
Author(s):  
Jarosław Zalewski

AbstractIn this paper, the selected phenomena related to a motor vehicle’s motion have been considered based on a computer simulation in MSC Adams/Car. The vehicle’s model performed a turning maneuver with the steering wheel release under different road conditions.All simulations have been performed based on the sports two-seater vehicle’s model, at the initial speed of 70 km/h on the flat and randomly uneven road. This enabled us to observe the selected phenomena along the road long enough to relate them to different aspects of road traffic safety in unusual situations. For uneven road, the same profiles were assumed for the left and the right wheel of the vehicle, with two coefficient values determining the maximum height of these irregularities.


2021 ◽  
Vol 22 (2) ◽  
pp. 178-189
Author(s):  
Mila Dirgawati ◽  
Gita Nur Apriani ◽  
Astien Arsten Asyari ◽  
R. Triyogo

ABSTRAK Kebisingan lalu lintas adalah salah satu ancaman bagi kesehatan masyarakat perkotaan. Paparan bising memberikan efek kesehatan jangka pendek dan panjang, dan efeknya berpotensi lebih buruk pada anak-anak yang belajar di sekolah pinggir jalan. Penelitian ini bertujuan untuk mengkarakterisasi kebisingan lalu lintas jalan di sekolah-sekolah yang terletak di jalan-jalan utama di Bandung, Indonesia serta memberikan rekomendasi mitigasi dan adaptasi untuk pengendalian kebisingan. Kebisingan lalu lintas diperoleh di dua sekolah pinggir jalan terletak di dua jalan utama (Jalan Suci dan Djuanda), beserta data volume dan komposisi lalu lintas, serta kecepatan kendaraan. Pengukuran dilakukan antara jam sekolah selama satu hari yang mewakili lokasi trotoar jalan, depan sekolah, dan halaman sekolah. Parameter tingkat kebisingan yang penting (Leq, L10, L50, L90) diukur, dan dilakukan analisis korelasi antara masing-masing parameter kebisingan. Model CoRTN digunakan untuk memprediksi kebisingan lalu lintas pada jarak tertentu dari jalan raya. Sepeda motor merupakan jenis kendaraan dominan secara berturut 79,1% dan 67,1% dari total volume kendaraan di ruas jalan Suci dan Djuanda. Kendaraan berat menyumbang <1%. Mayoritas kebisingan lalu lintas yang diukur sebagai Leq, L10, L50, L90 melebihi batas maksimum untuk pinggir jalan dan zona sekolah menurut standar internasional dan nasional <55 dBA). Model tersebut berkinerja lebih baik di ruas jalan Djuanda daripada Suci. Jumlah lokasi dan waktu pengukuran yang lebih banyak dapat memberikan penilaian paparan tingkat kebisingan lalu lintas yang lebih baik dengan menggunakan model CoRTN. Hasil penelitian ini diharapkan dapat menjadi masukan kebijakan berbasis pengetahuan bagi pemerintah kota dan lembaga untuk mengurangi dampak bising bagi anak didik. Kata kunci: kebisingan lalu lintas jalan, tingkat kebisingan, Model CoRTN   ABSTRACT Noise from road traffic is one of the most ubiquitous threats to the public health in urban setting. Its exposures have proven short-and long-term health effects. and potentially worse for vulnerable population such as children studying at roadside schools. This study aimed to characterize the road traffic noise at schools located at major roads in Bandung, Indonesia. Traffic noise were obtained at 2 roadside schools located at two major roads (Suci and Djuanda roads), along with data on traffic volume and composition, and vehicles speed. The measurement was conducted between school hours during one day-time only at locations representative of roadside, front of the schools, and schoolyard. Important noise level parameters such as Leq, L10, L50, L90 were recorded, and correlation analysis between each parameter was conducted. The CoRTN model was then applied to predict the traffic noise at particular distances from the road. Motorcycles were the predominant vehicle type on both road segments: 79.1% and 67.1% of the total vehicle volume on Suci on Djuanda segments, respectively.  Conversely, heavy vehicles accounted <1%. The majority of measured traffic noise determined as Leq, L10, L50, L90 exceeded the maximum limit for roadside and school zone set by the international and national standard (>55 dBA). The model performed better in Djuanda road segment than in Suci segment. More measurement locations and time could provide better assessment of exposure to traffic noise levels at roadside schools using the CoRTN model. Keywords: road traffic noise, noise level, CoRTN model


2012 ◽  
Vol 253-255 ◽  
pp. 1747-1750
Author(s):  
Yong Cun Zhu ◽  
Wen Yong Li ◽  
Yang Zhang ◽  
Tao Wang

To reduce traffic incident, it is imperative to take effective measures. This paper presents a dynamic route guidance method based on capacity constrained allocation method. Firstly, it analyzes the character of capacity constrained allocation method which takes into account the right of way and traffic load characteristics and used ant algorithms to optimize algorithm. Secondly, it integrates with multi-period continuous dynamic route guidance to realize the redistribution of road traffic flow . Finally, an example is took to prove that this manner can be a perfect solution to the road traffic evens on the impact of the road traffic flow.


2015 ◽  
Vol 22 (1) ◽  
pp. 121-124
Author(s):  
Amit Agrawal ◽  
S. Satish Kumar ◽  
Umamaheswara Reddy V.

Abstract A missed or delayed detection of intracranial injuries can lead to progressive neuronal damage and secondary brain damage. We present a case of 45 year female presented 8 after the road traffic accident and had a large posterior extradural hematoma on left side with mass effect. In addition there was a small speck of right frontal contusion with localized cerebral edema. The patient initially improved after evacuation of the hematoma. However on 3rd post-operative day she was complaining of headache and became progressively drowsy. A follow up CT scan showed increase in peri-lesional edema around the right frontal contusion with squashing of the lateral ventricles suggestive of diffuse cerebral edema. The patient was shifted back to intensive care unit and responded well to further conservative management. In our patient the events could be collaborated well with existing evidence (presence of contrecoup contusion and on clinical deterioration at day 3).


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