The Baltic Journal of Road and Bridge Engineering最新文献_第8页

Development of New Radar and Pyroelectric Sensors for Road Safety Increase in Cloud-Based Multi-Agent Control Application 基于云的多智能体控制应用中新型雷达和热释电传感器的发展

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-12-28 DOI: 10.7250/bjrbe.2021-16.540

L. Adrian, A. Avotiņš, Donato Repole, O. Tetervenoks

{"title":"Development of New Radar and Pyroelectric Sensors for Road Safety Increase in Cloud-Based Multi-Agent Control Application","authors":"L. Adrian, A. Avotiņš, Donato Repole, O. Tetervenoks","doi":"10.7250/bjrbe.2021-16.540","DOIUrl":"https://doi.org/10.7250/bjrbe.2021-16.540","url":null,"abstract":"The paper concentrates on the design, architecture, and monitoring of smart LED street lighting control, with focus on traffic safety and safe road infrastructure. The use of a CMAS (Cloud-Based Multi-Agent System) as a possible framework is investigated. The work is based on previous developments by the authors in the production and design of close and long-range hybrid Pyroelectric Infrared (PIR) motion detection sensors. It also introduces the advances in radar-type sensors used in smart SLC (street lighting control) application systems. The proposed sensor solutions can detect the road user (vehicle or pedestrian) and determine its movement direction and approximate speed that can be used for dynamic lighting control algorithms, traffic intensity prediction, and increased safety for both driver and pedestrian traffic. Furthermore, the street lighting system infrastructure can monitor city environmental parameters, such as temperature, humidity, CO2 levels, thus increasing levels of safety and security for smart cities. Utilising other hybrid systems within intelligent street lighting applications represents a new specialisation area in both energy-saving, safety awareness, and intelligent management.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129148687","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

Road Traffic Safety Development Trends in Latvia 拉脱维亚道路交通安全发展趋势

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-12-28 DOI: 10.7250/bjrbe.2021-16.539

J. Kreicbergs, J. Smirnovs, A. Lāma, J. Smirnovs, A. Zariņš

引用次数: 1

Feasibility-Based Design Model For Road Vertical Alignment 基于可行性的道路垂直线形设计模型

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-12-28 DOI: 10.7250/bjrbe.2021-16.548

Hongzhi Yang, Xuliang Guo, Zhenfeng Wang, Shanshan Hu

引用次数: 1

Analysis of Settlement Behaviour of Soft Ground Under Wide Embankment 宽路堤下软土地基沉降特性分析

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-12-28 DOI: 10.7250/bjrbe.2021-16.543

Xin Jiang, Xiaoli Chen, Yong-guo Fu, Han-yan Gu, Jinming Hu, X. Qiu, Y. Qiu

{"title":"Analysis of Settlement Behaviour of Soft Ground Under Wide Embankment","authors":"Xin Jiang, Xiaoli Chen, Yong-guo Fu, Han-yan Gu, Jinming Hu, X. Qiu, Y. Qiu","doi":"10.7250/bjrbe.2021-16.543","DOIUrl":"https://doi.org/10.7250/bjrbe.2021-16.543","url":null,"abstract":"An elastoplastic numerical model for calculating the consolidation settlement of wide embankment on soft ground is established using PLAXIS finite element software to investigate the settlement behaviour of soft ground under the wide embankment. The distribution rules are analysed and compared to narrow embankments, such as surface settlements of ground and embankment, lateral displacement of soft ground at the foot of embankment slope and excess pore pressure in soft ground. The influence rule of elastic modulus of soft ground on the settlement of soft ground under wide embankment is discussed. The results show that the settlement distributions of wide and narrow embankments on soft ground are “W” and “V” shapes, respectively. The maximum settlement of wide embankment is near the foot of the embankment slope, which is unequal to the settlement at the centreline of the embankment. The lateral displacement distribution rules of soft ground are both “belly” shaped at the foot of two types of embankments slope. However, the lateral displacement of the wide embankment is larger in each corresponding stage. During the construction period, the excess pore pressure in the soft ground under the wide embankment is much higher than that of the narrow embankment, so the post-construction consolidation time of the wide embankment is longer. Moreover, the macroscopic settlement rule of the wide embankment is still the same with the increase of elastic modulus of soft ground.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115814516","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

Assessment of Risky Cornering on a Horizontal Road Curve by Improving Vehicle Suspension Performance 基于改进车辆悬架性能的水平弯道危险转弯评估

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-12-28 DOI: 10.7250/bjrbe.2021-16.537

V. Žuraulis, Vytenis Surblys

引用次数: 2

Equipment Condition for Zebra Crossing Night-Time Safety Performance in Latvia 拉脱维亚斑马线夜间安全性能的设备条件

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-12-28 DOI: 10.7250/bjrbe.2021-16.541

Maris Seflers, J. Kreicbergs, G. Sauter

{"title":"Equipment Condition for Zebra Crossing Night-Time Safety Performance in Latvia","authors":"Maris Seflers, J. Kreicbergs, G. Sauter","doi":"10.7250/bjrbe.2021-16.541","DOIUrl":"https://doi.org/10.7250/bjrbe.2021-16.541","url":null,"abstract":"According to road traffic accident (hereinafter referred to as RTA) statistics, the vulnerable road users are pedestrians in Latvia. The aim of this study is to investigate and analyse technical equipment used on non-signalled pedestrian crossings (zebra crossings) in Latvia and to make suggestions for measures that would increase road traffic safety on zebra crossings. RTAs involving collisions with pedestrians were filtered from the Ministry of the Interior database for a three-year period from 2016 to 2018. Thirty-two zebra crossings with a higher number of accidents with pedestrians were observed on the spot during the daylight and at night in several cities of Latvia. The main emphasis during the observation was placed on traffic signs and zebra road marking performance. Pedestrian crossings were observed from car driver’s view by taking photographs during day-time and night-time observations. Most attention was paid to road sign and road marking visibility from driver’s seat position. Retroreflection coefficient R’ was measured for each pedestrian crossing road sign. It was found that the condition and performance of traffic organisation equipment were not maintained on a regular basis and the life cycle of some traffic signs had well expired. Many road signs do not comply with minimum requirements, and road markings have weak visibility during wet weather conditions. It is recommended to improve visibility of pedestrian crossings from driver’s view in the urban areas by increasing rain vision for road markings and higher retroreflection class for traffic signs.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129307774","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

Smart City Street Lighting System Quality and Control Issues To Increase Energy Efficiency and Safety 智慧城市街道照明系统的质量和控制问题，以提高能源效率和安全性

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-12-28 DOI: 10.7250/bjrbe.2021-16.538

A. Avotiņš, L. Adrian, R. Porins, P. Apse-Apsitis, L. Ribickis

{"title":"Smart City Street Lighting System Quality and Control Issues To Increase Energy Efficiency and Safety","authors":"A. Avotiņš, L. Adrian, R. Porins, P. Apse-Apsitis, L. Ribickis","doi":"10.7250/bjrbe.2021-16.538","DOIUrl":"https://doi.org/10.7250/bjrbe.2021-16.538","url":null,"abstract":"According to standards, the lighting system is one of the key elements to provide safety on city roads, defined by quality parameters. LED technology and movement detection sensor interaction bring about new regulation techniques, creating an energy-efficient smart LED lighting system concept. This paper reveals extensive comparative data analysis of Dialux simulation results before the project implementation phase and in-situ quality parameter measurements for various street profiles and LED luminary power types. After the project implementation phase, more than 1000 measurement points are reached. Further, energy efficiency increase issues in smart lighting systems are described in terms of LED luminary dimming profile analysis and future dynamic control application modes. The first findings clearly show that in most cases light output in simulation results is lower than in real situations; therefore, LED luminary power can be decreased, allowing for higher energy savings in first luminary maintenance years, keeping the same defined ME class or safety level. Let us suppose that the traffic intensity data are obtained from smart system sensors. In that case, the ME class can be dynamically selected during different night times, thus increasing safety and providing extra energy savings using the same system elements, as well as leading to better ROI values.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131708469","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: 5

Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement 基层模量对沥青路面应变分布的影响

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-12-28 DOI: 10.7250/bjrbe.2021-16.542

K. Yao, Xin Jiang, J. Jiang, Zhonghao Yang, Y. Qiu

{"title":"Influence of Modulus of Base Layer on The Strain Distribution for Asphalt Pavement","authors":"K. Yao, Xin Jiang, J. Jiang, Zhonghao Yang, Y. Qiu","doi":"10.7250/bjrbe.2021-16.542","DOIUrl":"https://doi.org/10.7250/bjrbe.2021-16.542","url":null,"abstract":"In order to investigate the influence of modulus of the base layer on the strain distribution for asphalt pavement, the modulus ratio of the base layer and the AC layer (Rm) is introduced as a controlled variable when keeping modulus of the AC layer as a constant in this paper. Then, a three-layered pavement structure is selected as an analytical model, which consists of an AC layer with the constant modulus and a base layer with the variable modulus covering the subgrade. A three dimensional (3D) finite element model was established to estimate the strains along the horizontal and vertical direction in the AC layer under different Rm. The results show that Rm will change the distribution of the horizontal strains along the depth in the AC layer; the increase of Rm could reduce the maximum tensile strain in the AC layer, but its effect is limited; the maximum tensile strain in the AC layer does not necessarily occur at the bottom, but gradually rises to the middle with the increase of Rm. Rm could significantly decline the bottom strain in the AC layer, and there is a certain difference between the bottom and the maximum strain when Rm is greater than or equal to one, which will enlarge with increasing Rm. Rm could change the depth of the neutral axis in the AC layer, and the second neutral axis will appear at the bottom of the AC layer under a sufficiently large Rm. The average vertical compressive strain in the AC layer will significantly enlarge with the increase of Rm.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129299383","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

Improving the Efficiency of the Vilnius City Transport System in the Context of Sustainable Mobility and Multimodality 在可持续移动和多式联运的背景下提高维尔纽斯城市交通系统的效率

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-09-29 DOI: 10.7250/bjrbe.2021-16.531

A. Jarašūnienė, Domas Česnulaitis

引用次数: 1

A Cost-Benefit Analysis of the Installation of an Automatic Incident Detection System in Vilnius 在维尔纽斯安装自动事件检测系统的成本效益分析

The Baltic Journal of Road and Bridge Engineering Pub Date : 2021-09-29 DOI: 10.7250/bjrbe.2021-16.534

A. Jarašūnienė, M. Novikova

{"title":"A Cost-Benefit Analysis of the Installation of an Automatic Incident Detection System in Vilnius","authors":"A. Jarašūnienė, M. Novikova","doi":"10.7250/bjrbe.2021-16.534","DOIUrl":"https://doi.org/10.7250/bjrbe.2021-16.534","url":null,"abstract":"A well-functioning transport network is a key element of a successful economy. One of the biggest problems in transportation is the large number of vehicles, which leads to congestion. Traffic congestion negatively influences the social and economic environment: it creates pollution and causes many accidents. A variety of innovative technologies are being applied in all areas. Different countries use Intelligent Transport Systems to create a safer, more efficient, and sustainable transport system to monitor and manage traffic flow. The application of Intelligent Transport Systems helps solve problems in the transport sector: Intelligent Transport Systems helps manage traffic flows, reduce accident rates, environmental pollution, and inform drivers and passengers about the traffic situation. Consequently, Intelligent Transport System improves the efficiency of the transport system, the quality of services, increases mobility, reduces energy consumption, and reduces the negative impact of vehicles on the environment. As reported by the Department of Statistics data in Lithuania, the number of road vehicles in the Vilnius region increases every year. Traffic accidents remain constant, and long-lasting traffic jams occur. Due to these reasons, Vilnius and its residents incur economic costs, and the transport system is used inefficiently. This article examines the importance of Intelligent Transport System application in solving congestion, pollution and accidents in Vilnius. A cost-benefit analysis of the Automatic Incident Detection System installation in Vilnius is performed.","PeriodicalId":297140,"journal":{"name":"The Baltic Journal of Road and Bridge Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115597028","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