Periodica Polytechnica Transportation Engineering最新文献_第6页

Analysis of Model Predictive Intersection Control for Autonomous Vehicles 自动驾驶汽车交叉口模型预测控制分析

Periodica Polytechnica Transportation Engineering Pub Date : 2023-05-11 DOI: 10.3311/pptr.22082

Zsófia Farkas, András Mihály, P. Gáspár

{"title":"Analysis of Model Predictive Intersection Control for Autonomous Vehicles","authors":"Zsófia Farkas, András Mihály, P. Gáspár","doi":"10.3311/pptr.22082","DOIUrl":"https://doi.org/10.3311/pptr.22082","url":null,"abstract":"Autonomous vehicles are in the main focus for automotive companies and urban traffic engineers as well. As their penetration rate in traffic becomes more and more pronounced due to improvement in sensor technologies and the corresponding infrastructure, new methods for autonomous vehicle controls become a necessity. For instance, autonomous vehicles can improve the performance of urban traffic and prevent the formation of congestions with the usage of Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication based control methods. One of the key area for improvement is centralized intersection control for autonomous vehicles, by which traveling times can be reduced and efficiency of traffic flow can be improved, while safety of passengers can be guaranteed through constraints built in the centralized design. The paper presents the analysis of a Model Predictive Control (MPC) method for the coordination of autonomous vehicles at intersections by comparing it with an offline constraint optimization considering time and energy optimal intervention of vehicles. The analysis has been evaluated in high-fidelity simulation environment CarSim, where the speed trajectories, traveling times and energy consumptions have been compared for the different methods. The simulations show that the proposed time-optimal MPC intersection control method results in similar traveling times of that given by the time-optimal offline constraint optimization, while the energy optimal optimization re-quires significantly more time for the autonomous vehicle to achieve. Due to the possibility of a congestion forming in the latter case, the proposed centralized MPC method is more applicable in real traffic scenarios.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47219258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Potential Benefits of Mixed Waste Collection Methods 混合废物收集方法的潜在效益

Periodica Polytechnica Transportation Engineering Pub Date : 2023-05-08 DOI: 10.3311/pptr.21851

A. Titrik

引用次数: 0

Dynamic Viscosity Prediction of Blends of Paving Grade Bitumen with Reclaimed Bitumen 路面级沥青与再生沥青共混物的动态粘度预测

Periodica Polytechnica Transportation Engineering Pub Date : 2023-05-05 DOI: 10.3311/pptr.21926

S. Rosta, L. Gáspár

{"title":"Dynamic Viscosity Prediction of Blends of Paving Grade Bitumen with Reclaimed Bitumen","authors":"S. Rosta, L. Gáspár","doi":"10.3311/pptr.21926","DOIUrl":"https://doi.org/10.3311/pptr.21926","url":null,"abstract":"The recycling of reclaimed asphalt pavement is of significant economic and environmental benefits. In this case, however, the satisfactory performance of the final product needs scientific planning of the mixture and thorough quality control. Before its use, a number of tests must be performed to verify that the binder meets the relevant requirements and can be used in asphalt mixtures. The binder characteristics in the reclaimed asphalt pavement and the expected properties of the binder blend in the new asphalt mixture must be known. For its prediction and calculation, a European standard offers the calculation of the penetration or softening point of the binder blend in the mixture with reclaimed asphalt content. However, in some countries, the determination of paving grade bitumen types (categories) is based not on dynamic viscosity measured with DSR instrument, so other validated test and calculation methods are in force. A viscosity-based method has not yet been validated for paving grade bitumens standardized on a penetration basis, although this method is more advantageous in many aspects when monitoring daily production processes; it is much shorter and requires less material than measuring softening point or penetration. The article deals with the measurement of the dynamic viscosity of bitumen blends of asphalt mixtures made using reclaimed asphalts, determined with a dynamic shear rheometer at different frequencies (0.1–10.0 Hz sweep). Furthermore, the relationships between the different composition ratios of national paving grade bitumens classified on the bases of penetration level and bitumens from reclaimed asphalt pavement are examined.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48700201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Profitability Determinants of Transport Service and Warehouse Enterprises 运输服务和仓储企业盈利能力的决定因素

Periodica Polytechnica Transportation Engineering Pub Date : 2023-05-05 DOI: 10.3311/pptr.21402

Arkadiusz J. Derkacz, A. Dudziak, O. Stopka, Mária Stopková

{"title":"Profitability Determinants of Transport Service and Warehouse Enterprises","authors":"Arkadiusz J. Derkacz, A. Dudziak, O. Stopka, Mária Stopková","doi":"10.3311/pptr.21402","DOIUrl":"https://doi.org/10.3311/pptr.21402","url":null,"abstract":"The main purpose of the research is to identify differences in the factors determining changes in the return on capital (ROE) of transport and warehouse enterprises in individual voivodeships in Poland. The research used the ROE decomposition method which was justified by mathematical aspects. It paid attention on the decomposition of relative differences shaping the changes in this specific indicator. The substantive basis is the modified 5-factor Du Pont model. This method allowed for analysing relative changes in three decision areas. These areas encompass operational, financial, and tax management. The findings confirmed that the differences in individual voivodeships compared to the entire section H in Poland result mainly from financial management. However, the examined differentiation was not dependent on tax management. The presented research results can represent the basis for the strategy of corporate management in section H in positioning against competitive enterprises in Poland. The research also allows for a macroeconomic analysis of the phenomena occurring in the transport as well as warehousing sector, especially in terms of changes in their profitability.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42653877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calibration Measurements and Computational Models of Sensors Used in Autonomous Vehicles 自动驾驶汽车传感器的标定测量与计算模型

Periodica Polytechnica Transportation Engineering Pub Date : 2023-05-03 DOI: 10.3311/pptr.18453

Csaba Hajdu, István Lakatos

{"title":"Calibration Measurements and Computational Models of Sensors Used in Autonomous Vehicles","authors":"Csaba Hajdu, István Lakatos","doi":"10.3311/pptr.18453","DOIUrl":"https://doi.org/10.3311/pptr.18453","url":null,"abstract":"An increasing number of vehicles are equipped with cameras. As perception sensors, they scan the surrounding area and supply the Advanced Driver Assistance Systems (ADAS) for building up an environmental model through the use of computer vision techniques. While they perform well under good weather conditions their efficiency is reduced by adverse environmental influences such as rain, fog and occlusion through dirt. As a consequence, the vision based ADAS obtains poor quality information, and the model also becomes faulty. This paper deals with methods to estimate information quality of cameras in order to warn the assistance system of possible wrong working conditions. In particular, situations of contamination or occlusion of the windshield or camera lens, as well as foggy weather are taken into account in this paper. In the issue of occlusion total, fractional and transparent effectuations have to be recognized and distinguished. Therefore, this paper proposes an approach based on edge analysis of consecutive frames and presents initial experimental results of the implementation. In the field of Fog Detection a method based on the Logarithmic Image Processing Model is described and the results are shown.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42082519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of Non-motorised Transport and Public Transport Facilities Using Bicycle Compatibility Index and Stop Coverage Ratio, in Vijayanagar, Bengaluru 使用自行车兼容性指数和站点覆盖率分析班加罗尔维贾亚纳加尔的非机动交通和公共交通设施

Periodica Polytechnica Transportation Engineering Pub Date : 2023-04-19 DOI: 10.3311/pptr.19195

Lingaraju Megha, S. Srikanth

引用次数: 0

Combined Use of Aerial Remote Sensing and Terrestrial Survey in ICAO eTOD's Electronic Terrain- and Obstacle Data Collection 航空遥感和地面勘测在ICAO eTOD电子地形和障碍物数据收集中的联合应用

Periodica Polytechnica Transportation Engineering Pub Date : 2023-04-19 DOI: 10.3311/pptr.20851

Zsolt Bagdi, G. Bakó, Z. Molnár

{"title":"Combined Use of Aerial Remote Sensing and Terrestrial Survey in ICAO eTOD's Electronic Terrain- and Obstacle Data Collection","authors":"Zsolt Bagdi, G. Bakó, Z. Molnár","doi":"10.3311/pptr.20851","DOIUrl":"https://doi.org/10.3311/pptr.20851","url":null,"abstract":"Maintaining and enhancing aviation safety at all times is an essential factor at various airports around the world. It is not enough to keep it at that level, as we also see from history that the volume of air traffic doubles almost every 15 years. The number of aircraft in traffic is constantly increasing, and airport infrastructure needs to be developed. Consequently, the challenges for aviation are also greater. Electronic Terrain- and Obstacle Data Collection (eTOD) at airports and their surroundings are an essential procedure for aviation safety that aims to organize databases of potentially dangerous flight obstacles. The process is based on passive optical aerial remote sensing from a fixed-wing aircraft. With the help of point cloud and geoinformatics software created during the processing of in-flight recordings and additional data, strictly defined terrain- and obstacle data can be organized into databases, the format of which is regulated by international standards and documents, according to which the obstacle database can be used internationally. These data sets are needed not only because they are required by law, but also because they form the basis for the design of various aircraft procedures and make a major contribution to safe aviation.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46991940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental Investigation of the Friction Modifying Effects of Graphene and C60 Fullerene Used as Nanoadditives in Engine Lubricating Oil Performed on an Oscillating Tribometer 石墨烯和C60富勒烯纳米添加剂对发动机润滑油摩擦改性效果的实验研究

Periodica Polytechnica Transportation Engineering Pub Date : 2023-03-30 DOI: 10.3311/pptr.20594

C. Tóth-Nagy, Á. Szabó

引用次数: 0

Long Term, Pre, and Post Impacts of SARS-CoV-2 Pandemic on Road Traffic Crashes in the Case of Budapest, Hungary 以匈牙利布达佩斯为例，严重急性呼吸系统综合征冠状病毒2型疫情对道路交通事故的长期、前期和后期影响

Periodica Polytechnica Transportation Engineering Pub Date : 2023-03-16 DOI: 10.3311/pptr.20765

Debela Jima, T. Sipos

{"title":"Long Term, Pre, and Post Impacts of SARS-CoV-2 Pandemic on Road Traffic Crashes in the Case of Budapest, Hungary","authors":"Debela Jima, T. Sipos","doi":"10.3311/pptr.20765","DOIUrl":"https://doi.org/10.3311/pptr.20765","url":null,"abstract":"SARS-CoV-2 is a pandemic that affects road traffic flaw and crashes globally. This study attempted to compare the situation of road traffic crashes in the city of Budapest before and after the SARS-CoV-2 pandemic to better understand its long-term percussive effects. The study considers 12208 road traffic crashes that registered between 20 May 2018 – 31 December 2021. The rate and severity of road traffic crashes during the SARS-CoV-2 pandemic examined by using a percentage frequency distribution and a severity index. This study depicted that most crashes reported during the normal daytime between15:01-18:00 (peak hour). The study indicated that during the SARS-CoV-2 pandemic the road traffic crashes were reduced by 20.15%. A rear-end collision was one of the most common type of catastrophes highly registered. Road users, particularly drivers, heavily endorsed crashes. Even though the proportion of road traffic crashes caused by alcohol consumption was modest (6%), the rate of alcohol consumption and its concentration increased slightly during the SARS-CoV-2 pandemic. At the same time the number of crashes caused by high-speed traffic maneuvers reduced. Improper interpretation of road traffic signs, road pavement condition and failure to respect proper sight distance were influential reasons of road traffic crashes among the top. Meanwhile, the distributional impact of careless driving in the aftermath of the SARS-CoV-2 pandemic causes a shift in rank. Therefore, this study proved that during SARS-CoV-2 pandemics road traffic crashes reduced, the rate and concentration of alcohol consumption increased, and careless driving was encouraged.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44743849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

An In-depth Statistical Analysis of Driver Speeding Attitudes and Behavior 驾驶员超速态度和行为的深度统计分析

Periodica Polytechnica Transportation Engineering Pub Date : 2023-02-20 DOI: 10.3311/pptr.20450

A. Atieh, K. Jadaan, H. Naghawi

引用次数: 0