scholarly journals Determinants of the Performance of Bat Gantries Installed to Carry Bat Commuting Routes over the S3 Expressway in Poland

Symmetry ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1022 ◽  
Author(s):  
Alicja Sołowczuk
Keyword(s):  
Road Traffic ◽  
Traffic Noise ◽  
Road Construction ◽  
Mitigation Measures ◽  
Network Expansion ◽  
Bat Activity ◽  
The Road ◽  
Experimental Stage ◽  
Different Levels ◽  
Significant Bearing

In road construction, environmental protection issues often become a challenge, both in the case of new routes and the existing network expansion projects. A number of specific issues are involved in severing of bat commuting routes and the relevant mitigation measures are still in the experimental stage. One of the measures are bat gantries installed on the established bat flyways aligned with the linear features of the landscape used by bats for echolocation calls, which is an example of the structures installed near Szczecin in Poland. The bat activity surveys revealed different levels of acceptance of the respective structures. The available studies identify the following factors as being relevant to relocated or modified commuting routes: road traffic volume, traffic noise, and light pollution. The article discusses which factors are the most likely to have a significant bearing on accepting specific structures by bats. The analyses show that a gantry structure can turn out to be acceptable to bats even on a completely new route if the landscape features are symmetrical and friendly to bats on both sides of the road and on both sides of their flyway as well. Conversely, without such a symmetry along the approach section, the structure may fail to perform.

scholarly journals Rapid Modeling Method for Road Traffic Noise Sources: A case study in Beijing

Noise Mapping ◽  
2015 ◽  
Vol 2 (1) ◽  
Author(s):  
L. Zhu ◽  
X. Li ◽  
C. Jiang ◽  
L. Liu ◽  
R. Wu ◽  
...  
Keyword(s):  
Road Traffic ◽  
Traffic Noise ◽  
Modeling Method ◽  
Model Parameters ◽  
Road Traffic Noise ◽  
Emission Model ◽  
Noise Sources ◽  
The Road ◽  
The Mean ◽  
Rapid Modeling

AbstractBased on the local road traffic conditions in Beijing, China, this contribution proposes a rapid modeling method for road traffic noise sources. Since establishing the standardized experiment fields are expensive, real roads are used to determine the road traffic noise emission model in the method. Due to the similarity in the urban structures in China and Japan, this paper uses the ASJ- 2013 model as a template and replaces its model parameters with the ones output by an optimization program which minimizes the sum of absolute errors between the predicted and the measured LAeq. Real road experiments are conducted to verify the effectiveness and feasibility of the modeling method. The mean error of the model deduced by the method and the ASJ-2013 model is respectively 0.4 dB and 2.6 dB, and the mean absolute error of the two models is respectively 1.1 dB and 2.6 dB. The results of the real road experiments show that the road traffic noise sources deduced by the method are more accurate to conduct local noise prediction than those of other models.

scholarly journals Low-Cost Road Construction and Rehabilitation in Unstable Mountain Areas

2021 ◽  
Vol 9 (9) ◽  
pp. 1152-1156
Author(s):  
Manish Jagannath Datar
Keyword(s):  
Traffic Safety ◽  
Financial Management ◽  
Construction Projects ◽  
Road Traffic ◽  
Low Cost ◽  
Road Construction ◽  
Research Problem ◽  
Mountain Areas ◽  
The Road ◽  
Road Traffic Safety

Abstract: The mountain roads are impacted by social, environmental and economic challenges. The financial management around the road construction and rehabilitation requires fine management and administrative skills to be done effectively by the local and the federal authorities. The objective of this study is to understand the factors affecting the low-cost road construction and rehabilitation in the unstable mountain areas and to analyze the solutions to the specific barriers. The materials and methods used here is a best evidence review focusing on the existing literature that emphasizes on the above-mentioned research problem. Global evidence has been used in order to draw a greater idea and explanation about the research topic. The results focus on the importance of technology leadership, financial management, risk control and mitigation, sociocultural benefits and socioeconomic scalability of the low-cost road construction and rehabilitation projects. The workforce management and stakeholder relations are very important as well for the effective running of the construction projects without any interference. The partnerships between the public and the private organizations is very much vital for ethical and regulatory compliances which is one of the major findings of the study. The sociocultural impact and the road traffic safety considerations are to be assessed properly in order to prevent and mitigate any project risk which is also a very important finding.

Social survey on the road traffic noise effect on the quality of life in Moroccan cities

2008 ◽  
Vol 123 (5) ◽  
pp. 3811-3811
Author(s):  
Weam Kharbaoui ◽  
Mohammed Garoum ◽  
Abdelaziz Bahoussa ◽  
Mohammed Rhachi
Keyword(s):  
Quality Of Life ◽  
Road Traffic ◽  
Traffic Noise ◽  
Road Traffic Noise ◽  
Social Survey ◽  
Noise Effect ◽  
The Road ◽  
On The Road

Acoustic Prediction Modeling and Sound Mapping of public transport users' exposure at a bus stop.

2021 ◽  
Vol 263 (2) ◽  
pp. 4058-4069
Author(s):  
Dayane Cristina Lima Estercio ◽  
Paulo Fernando Soares
Keyword(s):  
Road Traffic ◽  
Traffic Noise ◽  
Sound Level ◽  
Road Traffic Noise ◽  
High Frequencies ◽  
Reference Models ◽  
The Road ◽  
Bus Stop ◽  
Specular Reflections ◽  
The City

The objective of this research is to develop a mathematical model to predict the road traffic noise level at the bus stop, to assess the level of noise that users of these urban facilities are exposed daily. To help assess the exposure and the environmental impact, sound mapping will be performed using the IMMI software. In the model, the calculation of direct paths and specular reflections and diffuse was adopted. The study was applied in three sections in the city of Maringá, Brazil. At each point, the user was simulated standing and sitting. The sound source was positioned on the axis of each strip, every five meters. In total, 5124 readings of source positions were evaluated in 84 measured points. For the validation, the Anderson-Kurze, Kang, Yang and Zhang, Bistafa and Naish model were applied, and then the t-Student test were applied. The results showed a correspondence between the developed model, the data of the measurements and the reference models in the range of 25 Hz to 10000 Hz, there was a greater variance between the models applied in the high frequencies. It is concluded that the model was able to estimate the sound level of the stretches evaluated.

State and Trends of the Road Goods Transportation Field Development in Ukraine

2019 ◽  
Vol 10 (4) ◽  
pp. 1022
Author(s):  
Liubov KARBOVSKA ◽  
Anna BRATUS ◽  
Olena LOZHACHEVSKA ◽  
Ekaterina ZHELEZNIAK ◽  
Tamara NAVROTSKA
Keyword(s):  
Road Traffic ◽  
Road Construction ◽  
Transport Infrastructure ◽  
Rolling Stock ◽  
Road Transportation ◽  
Safety Control ◽  
Field Development ◽  
Motor Transport ◽  
The Road ◽  
The Eu

The advantages of using motor transport for transportation of goods are substantiated. On the basis of an analysis of the indicators of the volume of transported goods and the turnover of goods of motor transport in a number of countries of Europe (Austria, Great Britain, Spain, Italy, Poland, Finland, France, the Czech Republic, Sweden), reduction of activity in the field of road transportation of goods in 2013 − 2014 and its activation in 2015-2016 are established; in addition, the influence of such negative environmental factors on the activity of road transportation of goods as reduction of the trade turnover of these countries with Russia as a result of the EU sanctions, increasing competition in the road transportation market, and the strengthening of the EU requirements for rolling stock and social guarantees for transportation workers was identified. The statistical data on the volume of transported goods and goods turnover of motor and all types of transport during 2012 − 2017 in Ukraine was explored, and a number of problems were identified that hinder the development of this sphere of activity, the main of which are: low quality of transport infrastructure and, above all, unsatisfactory conditions of road communication lines and corruption in the road construction sector, resulting from inefficient management of the field of activity; low level of safety control as far as road traffic and environmental protection are concerned; environmental pollution by road transport with emissions of harmful gases and transport noise, etc. The basic areas of the development of the sphere of road transportations of goods and of the network of highways are determined.

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