M. Pallas, J. Cesbron, Simon Bianchetti, P. Klein, V. Cerezo, P. Augris, C. Ropert, F. Praticò, Francesco Bianco
Abstract In both the current and foreseen context of significant development of the electric vehicle (EV) fleet, a future increasing ratio of EVs in the urban traffic is expected, still enhanced in low-emission zones involving bans or restricted access to other vehicles. EVs are known to be quieter than conventional vehicles at low speed because of a low motor noise emission, resulting in a higher prevalence of rolling noise in the environmental noise. EVs differ from conventional vehicles in several parameters that can influence tyre/road noise, like weight and torque. The LIFE E-VIA project objectives consist in developing, implementing and assessing a low-noise road surface for light EV traffic in urban conditions, optimised from an acoustical and life cycle perspective. In parallel, an optimisation of EV tyres is investigated. Prior to forthcoming layout in Florence (Italy) for assessment under real traffic conditions, a prototypal road surface has been implemented and evaluated on a test track in Nantes (France). Preliminary tests carried out with different EVs on several road surfaces highlighted the variability of noise emission over vehicle types and pavements, leading to specific ranking. Two prototype versions of a low-noise road surface have been laid out in Nantes, respectively without and with crumb rubber. Both of them have been acoustically assessed with on-board microphones (CPX method) and at roadside (CPB method and microphone array). Constant speed, acceleration and deceleration conditions were considered for pass-by tests. Other acoustical or physical parameters have been measured: acoustic absorption, 3D-texture, mechanical impedance and skid resistance properties (BPN and MPD). In comparison with a reference DAC 0/10 road surface, very usual in France, a roadside noise reduction up to 4 dB(A) was found at steady pass-by speed 50 km/h. Grip values are very high and macrotexture levels moderate. Lastly, mixtures durability is analysed with laboratory tests.
{"title":"Life E-VIA: Prototypal Low-Noise Road Surface for the Reduction of Electric Vehicle Rolling Noise in Urban Area","authors":"M. Pallas, J. Cesbron, Simon Bianchetti, P. Klein, V. Cerezo, P. Augris, C. Ropert, F. Praticò, Francesco Bianco","doi":"10.2478/rjti-2022-0013","DOIUrl":"https://doi.org/10.2478/rjti-2022-0013","url":null,"abstract":"Abstract In both the current and foreseen context of significant development of the electric vehicle (EV) fleet, a future increasing ratio of EVs in the urban traffic is expected, still enhanced in low-emission zones involving bans or restricted access to other vehicles. EVs are known to be quieter than conventional vehicles at low speed because of a low motor noise emission, resulting in a higher prevalence of rolling noise in the environmental noise. EVs differ from conventional vehicles in several parameters that can influence tyre/road noise, like weight and torque. The LIFE E-VIA project objectives consist in developing, implementing and assessing a low-noise road surface for light EV traffic in urban conditions, optimised from an acoustical and life cycle perspective. In parallel, an optimisation of EV tyres is investigated. Prior to forthcoming layout in Florence (Italy) for assessment under real traffic conditions, a prototypal road surface has been implemented and evaluated on a test track in Nantes (France). Preliminary tests carried out with different EVs on several road surfaces highlighted the variability of noise emission over vehicle types and pavements, leading to specific ranking. Two prototype versions of a low-noise road surface have been laid out in Nantes, respectively without and with crumb rubber. Both of them have been acoustically assessed with on-board microphones (CPX method) and at roadside (CPB method and microphone array). Constant speed, acceleration and deceleration conditions were considered for pass-by tests. Other acoustical or physical parameters have been measured: acoustic absorption, 3D-texture, mechanical impedance and skid resistance properties (BPN and MPD). In comparison with a reference DAC 0/10 road surface, very usual in France, a roadside noise reduction up to 4 dB(A) was found at steady pass-by speed 50 km/h. Grip values are very high and macrotexture levels moderate. Lastly, mixtures durability is analysed with laboratory tests.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"11 1","pages":"1 - 17"},"PeriodicalIF":0.1,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42035719","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}
Abstract Transport activities are regarded as one of the greatest contributors to greenhouse gas (GHG) emissions. Even though in other economic sectors the trend is to reduce the greenhouse emissions, the transportation field has been facing a continuous growth with negative effects on the environment. Due to its harmful potential for the inhabitants of large urban areas, a special attention is required as the land use individualities, transport network features and both spatial and temporal distribution of human activities often leads to traffic congestion. Universities represent an important pole of attraction because of their role as centers of teaching, research and employment and the mobility generated by them must be taken into account. This research aimed to both develop an analysis of greenhouse emissions in urban congested areas and present the influence of a new pedestrian bridge between University Politehnica of Bucharest campus and student dormitories. An economic analysis is conducted to emphasize that the new construction will lead to benefits in terms of the reduction of travel time, vehicle operating costs, the level of greenhouse gas emissions, etc.
{"title":"Reorganizing Students Acces in University Politehnica of Bucharest Campus and Influences on Car Traffic Externalities","authors":"Șerban Stere, E. Rosca, M. Rosca, F. Rusca","doi":"10.2478/rjti-2022-0015","DOIUrl":"https://doi.org/10.2478/rjti-2022-0015","url":null,"abstract":"Abstract Transport activities are regarded as one of the greatest contributors to greenhouse gas (GHG) emissions. Even though in other economic sectors the trend is to reduce the greenhouse emissions, the transportation field has been facing a continuous growth with negative effects on the environment. Due to its harmful potential for the inhabitants of large urban areas, a special attention is required as the land use individualities, transport network features and both spatial and temporal distribution of human activities often leads to traffic congestion. Universities represent an important pole of attraction because of their role as centers of teaching, research and employment and the mobility generated by them must be taken into account. This research aimed to both develop an analysis of greenhouse emissions in urban congested areas and present the influence of a new pedestrian bridge between University Politehnica of Bucharest campus and student dormitories. An economic analysis is conducted to emphasize that the new construction will lead to benefits in terms of the reduction of travel time, vehicle operating costs, the level of greenhouse gas emissions, etc.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":" ","pages":"1 - 15"},"PeriodicalIF":0.1,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46314601","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}
Abstract Pollution is closely related to traffic characteristics (vehicle fleet, its composition in terms of motorization, park maintenance level, etc.), existing road infrastructure (depending on the classification of public roads into technical classes, the level of service) and last but not least, the speed of traffic on the public road network (depending on the designed geometric elements, local context, geographical position and climate). Determining optimal traffic speeds in order to reduce pollution is a highly debated topic for all categories of public roads, including highways, which by definition are designed and executed with distinct geometric elements to ensure high-speed road traffic. When adopting the geometric elements, the design speed adopted in accordance with the legislation in force, plays an essential and decisive role both in the design of new roads and in the rehabilitation of existing ones. The comparative study of the maximum design speeds (imposed by regulations) with the optimal ones in terms of reducing air pollution (recommended by specialized studies), can provide new perspectives from the point of view of all traffic participants by correlating the optimal average speeds with the designed geometric elements.
{"title":"Study on the Optimization of Design Speeds Required by the Need to Reduce Traffic Pollution","authors":"Gergely Marta Ildiko, Remus Ciocan, M. Dragomir","doi":"10.2478/rjti-2022-0009","DOIUrl":"https://doi.org/10.2478/rjti-2022-0009","url":null,"abstract":"Abstract Pollution is closely related to traffic characteristics (vehicle fleet, its composition in terms of motorization, park maintenance level, etc.), existing road infrastructure (depending on the classification of public roads into technical classes, the level of service) and last but not least, the speed of traffic on the public road network (depending on the designed geometric elements, local context, geographical position and climate). Determining optimal traffic speeds in order to reduce pollution is a highly debated topic for all categories of public roads, including highways, which by definition are designed and executed with distinct geometric elements to ensure high-speed road traffic. When adopting the geometric elements, the design speed adopted in accordance with the legislation in force, plays an essential and decisive role both in the design of new roads and in the rehabilitation of existing ones. The comparative study of the maximum design speeds (imposed by regulations) with the optimal ones in terms of reducing air pollution (recommended by specialized studies), can provide new perspectives from the point of view of all traffic participants by correlating the optimal average speeds with the designed geometric elements.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"11 1","pages":"1 - 20"},"PeriodicalIF":0.1,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42567558","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}
Abstract The most important source of environmental noise is generated by vehicular traffic on roads and highways. Several organisms have reported human health and various social problems related to noise. The Agua Negra international road seeks to improve the physical and commercial connectivity of the zones located between the ports of Porto Alegre in Brazil and Coquimbo in Chile. The Chilean sector includes the expansion and improvement of the Route 41-CH. The objective of this work is establishing a methodology to determine the cities or places with tourist, commercial and recreational interest on the route that may be affected by noise and which noise mitigation measures could be used to reduce the impacts. It was concluded that it will have an impact on the communities located along the route. We present mitigation measures to reduce the impact if they are considered from the design phase of the project.
{"title":"Methodology for mitigating noise impacts of a road. Case study for the chilean route 41-CH","authors":"A. Araya, S. Fingerhuth","doi":"10.2478/rjti-2022-0007","DOIUrl":"https://doi.org/10.2478/rjti-2022-0007","url":null,"abstract":"Abstract The most important source of environmental noise is generated by vehicular traffic on roads and highways. Several organisms have reported human health and various social problems related to noise. The Agua Negra international road seeks to improve the physical and commercial connectivity of the zones located between the ports of Porto Alegre in Brazil and Coquimbo in Chile. The Chilean sector includes the expansion and improvement of the Route 41-CH. The objective of this work is establishing a methodology to determine the cities or places with tourist, commercial and recreational interest on the route that may be affected by noise and which noise mitigation measures could be used to reduce the impacts. It was concluded that it will have an impact on the communities located along the route. We present mitigation measures to reduce the impact if they are considered from the design phase of the project.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":" ","pages":"1 - 17"},"PeriodicalIF":0.1,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47244011","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}
Abstract The research shows a comparative analysis of land transportation infrastructure where there is an intermodal competition in Peru, specifically between the Road and the Rail in the Central Region. Based on this analysis, it is established which means of freight transportation are used to carry goods such as solid bulks, by? incorporating producers and consumers who compete for mining logistics to the Callao Port. The results show that transferring the mining freight from the road to the rail reduces traffic congestion from heavy truck use.
{"title":"Intermodal Competition of Mining Freight Transportation: The Case of Peru","authors":"Gaston Casapia","doi":"10.2478/rjti-2022-0008","DOIUrl":"https://doi.org/10.2478/rjti-2022-0008","url":null,"abstract":"Abstract The research shows a comparative analysis of land transportation infrastructure where there is an intermodal competition in Peru, specifically between the Road and the Rail in the Central Region. Based on this analysis, it is established which means of freight transportation are used to carry goods such as solid bulks, by? incorporating producers and consumers who compete for mining logistics to the Callao Port. The results show that transferring the mining freight from the road to the rail reduces traffic congestion from heavy truck use.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":" ","pages":"1 - 12"},"PeriodicalIF":0.1,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49463060","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}
Tunde Oloriegbe, Odeleye A. Joshua, Adeyi A. Abubakar
Abstract It has been noticed that the concentration of particle pollutants in major nodal points in Zaria metropolis has continued to grow as the traffic volume increases. The concentration of particulate matter and meteorological data was measured within the Zaria metropolis and was limited to major ways within the town which include Kwangila, PZ, Kasua Mata, Agoro and Kofar Doka. The concentrations of the Particulate Matter in different particle sizes (P0.3, P0.5.P1.0, P2.5 and P5.0) were measured using particle counter, at each sampling point for 3hrs during the morning peak hours (7:00am to 10.00am), for 3hrs during the afternoon off peak hours (11.00am to 2:00pm) and for 3hrs for the evening peak hours (4:00 to 7:00pm) after a comprehensive traffic volume of vehicles plying the sampling points had been done for one month. The average traffic volume for the peak period (morning) across the five sampling points ranged from 2701-3060 while that of the evening peak hours ranged from 2676-3651. The average traffic volume for the off peak (afternoon) ranged from 1777-2255 with kwangila recording the highest traffic volume for both peak and off peak periods. The impact of traffic density on the concentration of particulate matter measured showed that increase in traffic led to a corresponding increase in the concentration of particulate matter recorded for both peak and off- peak periods. The P2.5 was used as bases for comparison with the AQI standard for peak and off peak periods. For peak hour session, the air quality at Kwangila, Kasua Mata and Agoro was classified as unhealthy and hazardous while that of PZ and Kofar Doka was classified unhealthy to people with heart and lungs diseases. The concentration of PM obtained for off-peak period for all the sampling points was classified moderate and safe when compared with AQI standard. In this regard, there is a need to not only promote public transportation with larger capacity of passengers but to also improve the public transportation system. This will reduce greenhouse gas emissions by providing a convenient option to reduce unnecessary driving and by lowering emissions per passenger kilometer travelled. The use of non-motorized means of transportation would also help in curbing excessive release of pollutants into the atmosphere. Planting of Trees along major ways to trap and absorb pollutants is another option of reducing the amount of pollutants in the atmosphere. The use of older vehicles should be discouraged. The older a vehicle is the more the tendency to emit more pollutants.
{"title":"Impact Assessment of Particulate Pollutants in Selected Traffic Congested Areas in Zaria Metropolis, Kaduna State, Nigeria","authors":"Tunde Oloriegbe, Odeleye A. Joshua, Adeyi A. Abubakar","doi":"10.2478/rjti-2022-0011","DOIUrl":"https://doi.org/10.2478/rjti-2022-0011","url":null,"abstract":"Abstract It has been noticed that the concentration of particle pollutants in major nodal points in Zaria metropolis has continued to grow as the traffic volume increases. The concentration of particulate matter and meteorological data was measured within the Zaria metropolis and was limited to major ways within the town which include Kwangila, PZ, Kasua Mata, Agoro and Kofar Doka. The concentrations of the Particulate Matter in different particle sizes (P0.3, P0.5.P1.0, P2.5 and P5.0) were measured using particle counter, at each sampling point for 3hrs during the morning peak hours (7:00am to 10.00am), for 3hrs during the afternoon off peak hours (11.00am to 2:00pm) and for 3hrs for the evening peak hours (4:00 to 7:00pm) after a comprehensive traffic volume of vehicles plying the sampling points had been done for one month. The average traffic volume for the peak period (morning) across the five sampling points ranged from 2701-3060 while that of the evening peak hours ranged from 2676-3651. The average traffic volume for the off peak (afternoon) ranged from 1777-2255 with kwangila recording the highest traffic volume for both peak and off peak periods. The impact of traffic density on the concentration of particulate matter measured showed that increase in traffic led to a corresponding increase in the concentration of particulate matter recorded for both peak and off- peak periods. The P2.5 was used as bases for comparison with the AQI standard for peak and off peak periods. For peak hour session, the air quality at Kwangila, Kasua Mata and Agoro was classified as unhealthy and hazardous while that of PZ and Kofar Doka was classified unhealthy to people with heart and lungs diseases. The concentration of PM obtained for off-peak period for all the sampling points was classified moderate and safe when compared with AQI standard. In this regard, there is a need to not only promote public transportation with larger capacity of passengers but to also improve the public transportation system. This will reduce greenhouse gas emissions by providing a convenient option to reduce unnecessary driving and by lowering emissions per passenger kilometer travelled. The use of non-motorized means of transportation would also help in curbing excessive release of pollutants into the atmosphere. Planting of Trees along major ways to trap and absorb pollutants is another option of reducing the amount of pollutants in the atmosphere. The use of older vehicles should be discouraged. The older a vehicle is the more the tendency to emit more pollutants.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":" ","pages":"1 - 17"},"PeriodicalIF":0.1,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48595276","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}
Abstract The traffic capacity of a roundabout depends very much on the existing traffic volumes on each approach, each direction of travel having an impact on the other movements in the intersection, especially on those with which it conflicts. Roundabouts where the turning maneuver has significant values, such as roads / streets where the left turn is allowed at long distances, substantially influence the capacity of the approach with which it intersects. This maneuver includes calculating delays and vehicle queues at all other arms, resulting in a reduction in their capacity and, ultimately, in the entire intersection. As can be seen from the results of the analyzed roundabout, U-turn (which replaces the left turn movement) produces a significant increase in delays on the rest of the approaches, thus preventing further development of the community.
{"title":"Roundabout with a strong U-Turn traffic","authors":"M. Lobază","doi":"10.2478/rjti-2022-0003","DOIUrl":"https://doi.org/10.2478/rjti-2022-0003","url":null,"abstract":"Abstract The traffic capacity of a roundabout depends very much on the existing traffic volumes on each approach, each direction of travel having an impact on the other movements in the intersection, especially on those with which it conflicts. Roundabouts where the turning maneuver has significant values, such as roads / streets where the left turn is allowed at long distances, substantially influence the capacity of the approach with which it intersects. This maneuver includes calculating delays and vehicle queues at all other arms, resulting in a reduction in their capacity and, ultimately, in the entire intersection. As can be seen from the results of the analyzed roundabout, U-turn (which replaces the left turn movement) produces a significant increase in delays on the rest of the approaches, thus preventing further development of the community.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"11 1","pages":"1 - 14"},"PeriodicalIF":0.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47996416","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}
Abstract Longitudinal variability in tyre/road noise is often associated with low-noise porous asphalt surfaces, with CPX testing results for individual 20-metre road segments commonly varying by up to 6 dB along new projects in New Zealand. In November 2018, following on from previous trials investigating the effects of air voids and stone size, three EPA7 trial sections were constructed to investigate the effects of layer thickness on tyre/road noise. The thickness effect was found to be approximately –2 dB LCPX:P1,80 per 10 mm increase in target layer thickness across the three trial sections. Core samples taken from a new road showed EPA7 layer thicknesses that differed from the target layer thickness by up to 15 mm. These findings suggest that variations in layer thickness may be a key contributor to longitudinal variations in tyre/road noise on roading projects using porous asphalt. A further investigation involving a detailed thickness survey is currently underway to better understand layer thickness variability and its effect on tyre/road noise.
{"title":"Investigating the effect of layer thickness on the variability of porous asphalt tyre/road noise","authors":"J. Bull, R. Wareing, S. Chiles, R. Jackett","doi":"10.2478/rjti-2022-0001","DOIUrl":"https://doi.org/10.2478/rjti-2022-0001","url":null,"abstract":"Abstract Longitudinal variability in tyre/road noise is often associated with low-noise porous asphalt surfaces, with CPX testing results for individual 20-metre road segments commonly varying by up to 6 dB along new projects in New Zealand. In November 2018, following on from previous trials investigating the effects of air voids and stone size, three EPA7 trial sections were constructed to investigate the effects of layer thickness on tyre/road noise. The thickness effect was found to be approximately –2 dB LCPX:P1,80 per 10 mm increase in target layer thickness across the three trial sections. Core samples taken from a new road showed EPA7 layer thicknesses that differed from the target layer thickness by up to 15 mm. These findings suggest that variations in layer thickness may be a key contributor to longitudinal variations in tyre/road noise on roading projects using porous asphalt. A further investigation involving a detailed thickness survey is currently underway to better understand layer thickness variability and its effect on tyre/road noise.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":"11 1","pages":"1 - 15"},"PeriodicalIF":0.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43149067","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}
Abstract As the traffic increases in urban areas, the noise generated by the vehicles has become a major concern during the last decade and many countries have been looking for solutions to reduce the level of disturbance. The lowering of the noise level by choosing the correct type of asphalt mixture may be considered as an alternative to sound-absorbing walls. The use of these low-noise asphalt mixtures requires a previous verification of the technical conditions and the performance levels they need to meet. The paper presents the research and laboratory tests aimed at comparing the physical-mechanical characteristics of a maximum 16mm grain size bituminous concrete (BA16) with a low-noise bituminous concrete used in the wearing course of bituminous pavements. This research started from the fact that the Romanian design standard for asphalt mixtures does not stipulate the physical-mechanical characteristics required by a low-noise asphalt mixture. Thus, in order to clarify this matter, the physical-mechanical characteristics of a 16mm grain size laboratory-made bituminous concrete (BA16) were compared to the characteristics of a low-noise asphalt mixture presented by the specialized literature. The results obtained following laboratory testing of the asphalt concrete and the research of the specialized literature concerning low-noise asphalt mixtures confirm the differences as far as their physical-mechanical characteristics are concerned (voids, bulk density, dry density, Marshall stability and flow and stiffness modulus).
{"title":"Aspects concerning the physical-mechanical characteristics of low-noise asphalt mixture","authors":"Adelin Stirb, P. Marc, A. Forton","doi":"10.2478/rjti-2022-0004","DOIUrl":"https://doi.org/10.2478/rjti-2022-0004","url":null,"abstract":"Abstract As the traffic increases in urban areas, the noise generated by the vehicles has become a major concern during the last decade and many countries have been looking for solutions to reduce the level of disturbance. The lowering of the noise level by choosing the correct type of asphalt mixture may be considered as an alternative to sound-absorbing walls. The use of these low-noise asphalt mixtures requires a previous verification of the technical conditions and the performance levels they need to meet. The paper presents the research and laboratory tests aimed at comparing the physical-mechanical characteristics of a maximum 16mm grain size bituminous concrete (BA16) with a low-noise bituminous concrete used in the wearing course of bituminous pavements. This research started from the fact that the Romanian design standard for asphalt mixtures does not stipulate the physical-mechanical characteristics required by a low-noise asphalt mixture. Thus, in order to clarify this matter, the physical-mechanical characteristics of a 16mm grain size laboratory-made bituminous concrete (BA16) were compared to the characteristics of a low-noise asphalt mixture presented by the specialized literature. The results obtained following laboratory testing of the asphalt concrete and the research of the specialized literature concerning low-noise asphalt mixtures confirm the differences as far as their physical-mechanical characteristics are concerned (voids, bulk density, dry density, Marshall stability and flow and stiffness modulus).","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":" ","pages":"1 - 13"},"PeriodicalIF":0.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49431789","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}
Abstract In this paper, we study the relationship between resilience and sustainable development in order to determine the place of road resilience in the Sustainable Development Goals (SDGs) such as climate action and energy transition. This study shows that road resilience is inseparable from adaptation to climate change, its mitigation and the energy transition. Therefore we address the issue of adapting road infrastructure to climate change and to the decarbonization of transport. It also emphasizes that resilience of road infrastructure is a necessary condition for any adaptation strategy and reminds us that the contribution of road transport to climate change mitigation overlaps in practice with the decarbonization goal resulting from energy transition.
{"title":"3 Key notions for road transport sustainability: Resilience, Climate action and Energy transition","authors":"É. Dimnet","doi":"10.2478/rjti-2022-0002","DOIUrl":"https://doi.org/10.2478/rjti-2022-0002","url":null,"abstract":"Abstract In this paper, we study the relationship between resilience and sustainable development in order to determine the place of road resilience in the Sustainable Development Goals (SDGs) such as climate action and energy transition. This study shows that road resilience is inseparable from adaptation to climate change, its mitigation and the energy transition. Therefore we address the issue of adapting road infrastructure to climate change and to the decarbonization of transport. It also emphasizes that resilience of road infrastructure is a necessary condition for any adaptation strategy and reminds us that the contribution of road transport to climate change mitigation overlaps in practice with the decarbonization goal resulting from energy transition.","PeriodicalId":40630,"journal":{"name":"Romanian Journal of Transport Infrastructure","volume":" ","pages":"1 - 20"},"PeriodicalIF":0.1,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43206096","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}
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