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Children pedestrians represent road users with some specifics because of which it is important to study and take into account their traffic behaviour when traffic infrastructure is designed. Design should ensure and enhance their traffic safety because for decades, traffic accidents have been among the first few causes of children and adolescent mortality. Pedestrian speed is one of the important inputs when pedestrian infrastructure, especially crosswalks, is designed. On corridors where children are expected on a daily basis as independent pedestrians, the infrastructure should be adjusted to their characteristics and needs. The results of a study conducted in two Croatian cities of a similar size but of different urban and traffic conditions are presented in this paper. This study aimed at establishing and analysing children’s pedestrian speed while crossing the signalized crosswalk in the buffer area of elementary schools, mostly on primary roads in the school vicinity. Children aged 5–15 were observed, and accordingly V15, V50, and V85 speeds were established on the basis of altogether 600 measurements. Speed was established for children walking individually, in a group and supervised by adults, and of a different age, and based on their gender, the impact of infrastructural elements on their speed in traffic was also analysed. Significant differences were found between children’s speed measured in similar conditions in analysed cities and between some of the analysed groups. This fact proves that when improving conditions for children’s independent movement, it is important to consider their specifics in order to ensure safe design adjusted to children’s needs and limitations. As design speed in this paper, 15 percentile speed (V15) is considered. Suggestions on how to establish children pedestrian speed for design of routes regularly used by school children are proposed as well as some inputs elicited from the study done in Croatia are presented.
Irena Ištoka Otković; Aleksandra Deluka-Tibljaš; Sanja Šurdonja. Analysis of Children’s Traffic Behaviour at Signalized Crosswalks as a Precondition for Safe Children Routes Design: A Case Study from Croatia. Journal of Advanced Transportation 2021, 2021, 1 -14.
AMA StyleIrena Ištoka Otković, Aleksandra Deluka-Tibljaš, Sanja Šurdonja. Analysis of Children’s Traffic Behaviour at Signalized Crosswalks as a Precondition for Safe Children Routes Design: A Case Study from Croatia. Journal of Advanced Transportation. 2021; 2021 ():1-14.
Chicago/Turabian StyleIrena Ištoka Otković; Aleksandra Deluka-Tibljaš; Sanja Šurdonja. 2021. "Analysis of Children’s Traffic Behaviour at Signalized Crosswalks as a Precondition for Safe Children Routes Design: A Case Study from Croatia." Journal of Advanced Transportation 2021, no. : 1-14.
Spatial and traffic planning is important in order to achieve a quality, safe, functional, and integrated urban environment. Different tools and expert models were developed that are aimed at a more objective view of the consequences of reconstruction in different spatial and temporal ranges while respecting selection criteria. In this paper we analyze the application of the multi-criteria analysis method when choosing sustainable traffic solutions in the center of a small town, in this case Belišće, Croatia. The goal of this paper is to examine the possibility of improving the methodology for selecting an optimal spatial–traffic solution by combining the quantifiable results of the traffic microsimulation and the method of multi-criteria optimization. Socially sensitive design should include psychological and social evaluation criteria that are included in this paper as qualitative spatial–urban criteria. In the optimization process, different stakeholder groups (experts, students, and citizens) were actively involved in evaluating the importance of selected criteria. The analysis of stakeholders’ survey results showed statistically significant differences in criteria preference among three groups. The AHP (Analytic Hierarchy Process) multi-criteria analysis method was used; a total of five criteria groups (functional, safety, economic, environmental, and spatial–urban) were developed, which contain 21 criteria and 7 sub-criteria; and the weights of criteria groups were varied based on stakeholders’ preferences. The application of the developed methodology enabled the selection of an optimal solution for the improvement of traffic conditions in a small city with the potential to also be applied to other types of traffic–spatial problems and assure sustainable traffic planning.
Irena Ištoka Otković; Barbara Karleuša; Aleksandra Deluka-Tibljaš; Sanja Šurdonja; Mario Marušić. Combining Traffic Microsimulation Modeling and Multi-Criteria Analysis for Sustainable Spatial-Traffic Planning. Land 2021, 10, 666 .
AMA StyleIrena Ištoka Otković, Barbara Karleuša, Aleksandra Deluka-Tibljaš, Sanja Šurdonja, Mario Marušić. Combining Traffic Microsimulation Modeling and Multi-Criteria Analysis for Sustainable Spatial-Traffic Planning. Land. 2021; 10 (7):666.
Chicago/Turabian StyleIrena Ištoka Otković; Barbara Karleuša; Aleksandra Deluka-Tibljaš; Sanja Šurdonja; Mario Marušić. 2021. "Combining Traffic Microsimulation Modeling and Multi-Criteria Analysis for Sustainable Spatial-Traffic Planning." Land 10, no. 7: 666.
Children pedestrians make up 30% of the total number of children injured in road traffic in the EU. Research shows that children are injured more often in the urban areas, in residential areas near schools and parks, often at intersections and pedestrian crossings. In this study, children’s traffic behavior was analyzed by observation of signalized pedestrian crosswalks. According to the same methodology, the research was conducted in three cities in two countries (Enna, Italy, Osijek and Rijeka, Croatia) with different urban and traffic characteristics. A total of 900 measurements were analyzed, 300 in each of the cities at 18 pedestrian crosswalks located in an urban setting in the vicinity of primary schools. A detailed statistical analysis of the influence parameters shows that, as general influence parameters, pedestrian crosswalk length, movement in a group and the age of children can be distinguished. Factors that have proven to have a significant influence on the movement of children in two of the three cities observed are gender, supervision by adults, running and cellphone use. The result can serve as a valuable input for interventions in traffic education as well as a basis for the improvement of traffic conditions at intersections where children are regularly present.
Aleksandra Deluka-Tibljaš; Irena Ištoka Otković; Tiziana Campisi; Sanja Šurdonja. Comparative Analyses of Parameters Influencing Children Pedestrian Behavior in Conflict Zones of Urban Intersections. Safety 2021, 7, 5 .
AMA StyleAleksandra Deluka-Tibljaš, Irena Ištoka Otković, Tiziana Campisi, Sanja Šurdonja. Comparative Analyses of Parameters Influencing Children Pedestrian Behavior in Conflict Zones of Urban Intersections. Safety. 2021; 7 (1):5.
Chicago/Turabian StyleAleksandra Deluka-Tibljaš; Irena Ištoka Otković; Tiziana Campisi; Sanja Šurdonja. 2021. "Comparative Analyses of Parameters Influencing Children Pedestrian Behavior in Conflict Zones of Urban Intersections." Safety 7, no. 1: 5.
Modeling the behavior of pedestrians is an important tool in the analysis of their behavior and consequently ensuring the safety of pedestrian traffic. Children pedestrians show specific traffic behavior which is related to cognitive development, and the parameters that affect their traffic behavior are very different. The aim of this paper is to develop a model of the children-pedestrian’s speed at a signalized pedestrian crosswalk. For the same set of data collected in the city of Osijek—Croatia, two models were developed based on neural network and multiple linear regression. In both cases the models are based on 300 data of measured children speed at signalized pedestrian crosswalks on primary city roads located near a primary school. As parameters, both models include the selected traffic infrastructure features and children’s characteristics and their movements. The models are validated on data collected on the same type of pedestrian crosswalks, using the same methodology in two other urban environments—the city of Rijeka, Croatia and Enna in Italy. It was shown that the neural network model, developed for Osijek, can be applied with sufficient reliability to the other two cities, while the multiple linear regression model is applicable with relatively satisfactory reliability only in Rijeka. A comparative analysis of the statistical indicators of reliability of these two models showed that better results are achieved by the neural network model.
Irena Otković; Aleksandra Deluka-Tibljaš; Sanja Šurdonja; Tiziana Campisi. Development of Models for Children—Pedestrian Crossing Speed at Signalized Crosswalks. Sustainability 2021, 13, 777 .
AMA StyleIrena Otković, Aleksandra Deluka-Tibljaš, Sanja Šurdonja, Tiziana Campisi. Development of Models for Children—Pedestrian Crossing Speed at Signalized Crosswalks. Sustainability. 2021; 13 (2):777.
Chicago/Turabian StyleIrena Otković; Aleksandra Deluka-Tibljaš; Sanja Šurdonja; Tiziana Campisi. 2021. "Development of Models for Children—Pedestrian Crossing Speed at Signalized Crosswalks." Sustainability 13, no. 2: 777.
Dvotračna kružna raskrižja primjenjuju se kao rješenje koje povećava kapacitet raskrižja (u usporedbi s klasičnim i jednotračnim kružnim raskrižjem), ali istovremeno značajno smanjuje razinu prometne sigurnosti. Alternativna kružna raskrižja pokazala se kao „kompromis“ između većeg kapaciteta, u odnosu na jednotračna i bolje prometne sigurnosti, u odnosu na dvotračna kružna raskrižja. U radu je prikazana analiza primjene alternativnih kružnih raskrižja na lokaciji postojećeg dvotračnog kružnog raskrižja te višekriterijska analiza kao alat pri odabiru optimalne varijante.
Sanja Šurdonja; Ivan Rutko; Aleksandra Deluka-Tibljaš. Alternativna kružna raskrižja kao mjera poboljšanja sigurnosti prometa na raskrižjima. Zbornik radova 2020, 23, 83 -98.
AMA StyleSanja Šurdonja, Ivan Rutko, Aleksandra Deluka-Tibljaš. Alternativna kružna raskrižja kao mjera poboljšanja sigurnosti prometa na raskrižjima. Zbornik radova. 2020; 23 (1):83-98.
Chicago/Turabian StyleSanja Šurdonja; Ivan Rutko; Aleksandra Deluka-Tibljaš. 2020. "Alternativna kružna raskrižja kao mjera poboljšanja sigurnosti prometa na raskrižjima." Zbornik radova 23, no. 1: 83-98.
One of the most common applications of microsimulation traffic modeling is an analysis of the impact of construction or reconstruction of traffic facilities/infrastructure, as well as changes in traffic regulation to the observed traffic network, still in the planning stage. Having in mind that the functioning of the transport system is influenced by variable human behavior, which is, among other things, territorially and culturally conditioned, the microsimulation model must be calibrated or adjusted to the local characteristics of the transport network and its users. The method of calibration of the VISSIM microsimulation model, by using neural networks, was developed on the urban transport network of the city of Osijek (Croatia). Validation procedures on the other intersections of the same transport network (in the city Osijek) gave results which correspond well to those measured in actual traffic conditions. This paper presents the results of the validation of the calibration procedure on the new transport network of the city of Rijeka, with significantly different characteristics of the transport network as well as the different behavior of drivers. VISSIM microsimulation model was calibrated by the use of neural networks and applied to simulate the change of the selected road to the pedestrian zone at a given time in the urban traffic network of Rijeka. The simulation results were compared with results achieved at the field in the situation of the actual closing of the observed road. Analysis of the results gives a basic insight into the applicability of method of calibration of the VISSIM microsimulation model to the urban transport network with different characteristics of the transport network and the user on which the calibration method has been developed.
Irena Ištoka Otković; Aleksandra Deluka-Tibljaš; Sanja Šurdonja. Validation of the calibration methodology of the micro-simulation traffic model. Transportation Research Procedia 2020, 45, 684 -691.
AMA StyleIrena Ištoka Otković, Aleksandra Deluka-Tibljaš, Sanja Šurdonja. Validation of the calibration methodology of the micro-simulation traffic model. Transportation Research Procedia. 2020; 45 ():684-691.
Chicago/Turabian StyleIrena Ištoka Otković; Aleksandra Deluka-Tibljaš; Sanja Šurdonja. 2020. "Validation of the calibration methodology of the micro-simulation traffic model." Transportation Research Procedia 45, no. : 684-691.
Sustainable management of urban areas is becoming during the last decades, one of the most important challenges of the 21st century that resulted in the concept of “smart city“. The city can be defined as "smart" when social capital, traditional and modern (ICT) communication infrastructure encourage sustainable economic development and high quality of life. Smart Mobility is often highlighted as a key system without which the Smart City could not be sustainable. A number of smart solutions have been analyzed and implemented in the context of smart mobility/movement in the cities and beyond. Many of these solutions are based on IT and they include a vehicle navigation system, e-parking, e-ticket, info-mobility signalization, demand-responsive transport, car sharing, bike sharing, public transport live tracking but also some innovative solutions are not necessarily related to IT (walking bus). Smart Mobility Survey has been conducted in Croatia and Italy during 2017 with the aim to establish users’ opinion on a number of the above-mentioned solutions that have been lately used in the cities worldwide. The survey has examined the familiarity with such solutions, their current use, and future expectations of using smart solutions in everyday life. The results showed, among Croatian responders, more limitations in accepting new technological solutions for mobility in the future. This points to the need to have a more public debate about future mobility solutions and their benefits in order to bring them closer to the wider population.
Sanja Šurdonja; Tullio Giuffrè; Aleksandra Deluka-Tibljaš. Smart mobility solutions – necessary precondition for a well-functioning smart city. Transportation Research Procedia 2020, 45, 604 -611.
AMA StyleSanja Šurdonja, Tullio Giuffrè, Aleksandra Deluka-Tibljaš. Smart mobility solutions – necessary precondition for a well-functioning smart city. Transportation Research Procedia. 2020; 45 ():604-611.
Chicago/Turabian StyleSanja Šurdonja; Tullio Giuffrè; Aleksandra Deluka-Tibljaš. 2020. "Smart mobility solutions – necessary precondition for a well-functioning smart city." Transportation Research Procedia 45, no. : 604-611.
Pavement skid resistance is one of determining road features that contributes to traffic safety. Several influencing factors govern the skid resistance, amongst which the pavement surface texture is the one that could be designed and controlled by the pavement engineers. Pavement surface texture is classified into four categories, where microtexture and macrotexture level affect the pavement skid resistance. Microtexture contributes to skid resistance at low traffic speed, while macrotexture governs skid resistance at high speed. Macrotexture is a result of asphalt mixture properties, mostly the aggregate gradation, maximum aggregate size, binder and air voids content. Macrotexture is usually measured using different volumetric or optical devices, and the measuring results are expressed as texture depth or profile depth values. Several studies showed that macrotexture level can be correlated to pavement skid resistance performance. Previously conducted small-scale case study performed on road network in City of Rijeka analyzed the influence of pavement surface renewal treatment on macrotexture values increase and its influence on skid resistance values. In this paper, an analysis of measured macrotexture and skid resistance values is shown for a greater set of data. The measurements were conducted on selected highway section in Croatia, using laser profilometer for macrotexture determination and surface friction trailer for skid resistance determination. Both pavement surface performance indicators – Mean profile depth (MPD) for the macrotexture and longitudinal friction coefficient (LFC) for the skid resistance were measured before and after the renewal treatment in order to determine the influence of the renewal treatment on the surface performance improvement. The measured values were then correlated, showing that skid resistance is connected to the level of pavement surface macrotexture.
Ivana Pranjić; Aleksandra Deluka-Tibljaš; Marijana Cuculic; Sanja Šurdonja. Influence of pavement surface macrotexture on pavement skid resistance. Transportation Research Procedia 2020, 45, 747 -754.
AMA StyleIvana Pranjić, Aleksandra Deluka-Tibljaš, Marijana Cuculic, Sanja Šurdonja. Influence of pavement surface macrotexture on pavement skid resistance. Transportation Research Procedia. 2020; 45 ():747-754.
Chicago/Turabian StyleIvana Pranjić; Aleksandra Deluka-Tibljaš; Marijana Cuculic; Sanja Šurdonja. 2020. "Influence of pavement surface macrotexture on pavement skid resistance." Transportation Research Procedia 45, no. : 747-754.
Tiziana Campisi; Aleksandra Deluka-Tibljaš; Giovanni Tesoriere; Antonino Canale; Marko Rencelj; Sanja Šurdonja. Cycling traffic at turbo roundabouts: some considerations related to cyclist mobility and safety. Transportation Research Procedia 2020, 45, 627 -634.
AMA StyleTiziana Campisi, Aleksandra Deluka-Tibljaš, Giovanni Tesoriere, Antonino Canale, Marko Rencelj, Sanja Šurdonja. Cycling traffic at turbo roundabouts: some considerations related to cyclist mobility and safety. Transportation Research Procedia. 2020; 45 ():627-634.
Chicago/Turabian StyleTiziana Campisi; Aleksandra Deluka-Tibljaš; Giovanni Tesoriere; Antonino Canale; Marko Rencelj; Sanja Šurdonja. 2020. "Cycling traffic at turbo roundabouts: some considerations related to cyclist mobility and safety." Transportation Research Procedia 45, no. : 627-634.
Reconstruction of the intersection on the traffic network is necessary to maintain the required level of traffic safety for all road users, intersection capacity, and the functioning of the intersection in the changed conditions which occur due to, for example, increasing or redistributing traffic or connecting new roads on the network. Before reconstruction, it is necessary to analyze the existing situation, identify deficiencies or potential problems and propose several alternative solutions. Different alternative solutions are usually compared by using predefined criteria and sub-criteria. In some cases, due to a greater number of criteria and sub-criteria, the process of selecting the optimal solution (alternative) can be very complex. In the selection process of the optimal alternative, the application of the multi-criteria analysis method has a significant role. This paper presents the application of AHP (Analytic Hierarchy Process) method in the case of reconstruction of sub-urban intersection, the connection to the motorway. The AHP method is one of the most commonly used multi-criteria method in choosing solutions in the planning, design, maintenance and reconstruction of transport infrastructure. The AHP method, in this case, was used as a tool for selecting the optimal between 3 alternative solutions based on 5 criteria and 12 sub-criteria. In addition, to choosing the optimal solution, the AHP method plays a significant role in sensitivity analysis which shows how the change in criteria importance affects the outcome, that is, the ranking of individual alternative.
Sanja Šurdonja; Ivan Kišić; Aleksandra Deluka-Tibljaš; Barbara Karleuša. Use of AHP method in the traffic planning - Example of selecting an optimal intersection type. PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019) 2019, 2186, 160002 .
AMA StyleSanja Šurdonja, Ivan Kišić, Aleksandra Deluka-Tibljaš, Barbara Karleuša. Use of AHP method in the traffic planning - Example of selecting an optimal intersection type. PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019). 2019; 2186 (1):160002.
Chicago/Turabian StyleSanja Šurdonja; Ivan Kišić; Aleksandra Deluka-Tibljaš; Barbara Karleuša. 2019. "Use of AHP method in the traffic planning - Example of selecting an optimal intersection type." PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019) 2186, no. 1: 160002.
Tiziana Campisi; Dario Ticali; Aleksandra Deluka-Tibljaš; Sanja Šurdonja. Preface of the Symposium “Traffic Infrastructure and Modelling” (TIAM-19). PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019) 2019, 2186, 160001 .
AMA StyleTiziana Campisi, Dario Ticali, Aleksandra Deluka-Tibljaš, Sanja Šurdonja. Preface of the Symposium “Traffic Infrastructure and Modelling” (TIAM-19). PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019). 2019; 2186 (1):160001.
Chicago/Turabian StyleTiziana Campisi; Dario Ticali; Aleksandra Deluka-Tibljaš; Sanja Šurdonja. 2019. "Preface of the Symposium “Traffic Infrastructure and Modelling” (TIAM-19)." PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019) 2186, no. 1: 160001.
The main function of roundabouts is to assure traffic safety and capacity. Operational speed in roundabouts, important for both scopes, is regularly checked in the process of planning and design of roundabouts according to procedures (or models) defined in national technical regulation. There are two mainly used models, one developed in USA and other developed in Netherlands literature. The analyzed regulation for roundabouts from all over the world, except the USA, defines straight direction as a critical movement in the roundabout even there is no available research and comparison with speeds in other directions. In this research, the goal was to experimentally establish critical movement in the roundabout. The operational speed, in this case, was established through measurements done with precise GNSS equipment at single-lane, four-leg roundabout in Croatia. The results showed, with statistical relevance, that there are differences between speeds for different directions and that straight direction is the critical movement regarding the speed at roundabouts.
Sanja Šurdonja; Aleksandra Deluka-Tibljaš; Marijana Cuculić; Vesna Dragčević. The Relevant Direction of Vehicle Movement for Checking the Operational Speed at the Roundabout. Plant-Microbes-Engineered Nano-particles (PM-ENPs) Nexus in Agro-Ecosystems 2019, 329 -338.
AMA StyleSanja Šurdonja, Aleksandra Deluka-Tibljaš, Marijana Cuculić, Vesna Dragčević. The Relevant Direction of Vehicle Movement for Checking the Operational Speed at the Roundabout. Plant-Microbes-Engineered Nano-particles (PM-ENPs) Nexus in Agro-Ecosystems. 2019; ():329-338.
Chicago/Turabian StyleSanja Šurdonja; Aleksandra Deluka-Tibljaš; Marijana Cuculić; Vesna Dragčević. 2019. "The Relevant Direction of Vehicle Movement for Checking the Operational Speed at the Roundabout." Plant-Microbes-Engineered Nano-particles (PM-ENPs) Nexus in Agro-Ecosystems , no. : 329-338.
Sanja Šurdonja; Vesna Dragčević; Aleksandra Deluka-Tibljaš; Željko Korlaet. Model of vehicle path radius at roundabout centre. Journal of the Croatian Association of Civil Engineers 2019, 71, 163 -175.
AMA StyleSanja Šurdonja, Vesna Dragčević, Aleksandra Deluka-Tibljaš, Željko Korlaet. Model of vehicle path radius at roundabout centre. Journal of the Croatian Association of Civil Engineers. 2019; 71 (3):163-175.
Chicago/Turabian StyleSanja Šurdonja; Vesna Dragčević; Aleksandra Deluka-Tibljaš; Željko Korlaet. 2019. "Model of vehicle path radius at roundabout centre." Journal of the Croatian Association of Civil Engineers 71, no. 3: 163-175.
Održiva mobilnost ima za cilj osiguravanje mobilnosti, prvenstveno u urbanim područjima, uz istovremeno racionalno korištenje prostora, okoliša i pozitivan utjecaj na zdravlje i općenito kvalitetu života. U ovome radu se prikazuje primjena ovoga koncepta na primjeru manjeg grada, Grada Otočca. Odabrana je uža zona centra Otočca za koju su analizirani prometno-prostorni pokazatelji te predložena rješenja kojima se uz minimalnu dodatnu izgradnju može postići unaprjeđenje prometnog sustava, što je u radu obrazloženo.
Aleksandra Deluka-Tibljaš; Sanja Šurdonja; Dolores Marković. Primjena načela održive mobilnosti na unaprjeđenju prometnih uvjeta manjih gradova. Zbornik radova 2018, 20, 93 -109.
AMA StyleAleksandra Deluka-Tibljaš, Sanja Šurdonja, Dolores Marković. Primjena načela održive mobilnosti na unaprjeđenju prometnih uvjeta manjih gradova. Zbornik radova. 2018; 20 (1):93-109.
Chicago/Turabian StyleAleksandra Deluka-Tibljaš; Sanja Šurdonja; Dolores Marković. 2018. "Primjena načela održive mobilnosti na unaprjeđenju prometnih uvjeta manjih gradova." Zbornik radova 20, no. 1: 93-109.
Tullio Giuffre; Sanja Šurdonja; Aleksandra Deluka-Tibljaš. Augmented transportation: implications of autonomous vehicles outset in traffic. Road and Rail Infrastructure V 2018, 1 .
AMA StyleTullio Giuffre, Sanja Šurdonja, Aleksandra Deluka-Tibljaš. Augmented transportation: implications of autonomous vehicles outset in traffic. Road and Rail Infrastructure V. 2018; ():1.
Chicago/Turabian StyleTullio Giuffre; Sanja Šurdonja; Aleksandra Deluka-Tibljaš. 2018. "Augmented transportation: implications of autonomous vehicles outset in traffic." Road and Rail Infrastructure V , no. : 1.
Aleksandra Deluka-Tibljaš; Sanja Šurdonja; Dario Malatestinić; Luka Strineka. Operating speed on urban road network – Case study in Rijeka, Croatia. Road and Rail Infrastructure V 2018, 1 .
AMA StyleAleksandra Deluka-Tibljaš, Sanja Šurdonja, Dario Malatestinić, Luka Strineka. Operating speed on urban road network – Case study in Rijeka, Croatia. Road and Rail Infrastructure V. 2018; ():1.
Chicago/Turabian StyleAleksandra Deluka-Tibljaš; Sanja Šurdonja; Dario Malatestinić; Luka Strineka. 2018. "Operating speed on urban road network – Case study in Rijeka, Croatia." Road and Rail Infrastructure V , no. : 1.
Driving experiences provided by the introduction of new vehicle technologies are directly impacting the criteria for road network design. New criteria should be taken into consideration by designers, researchers and car owners in order to assure traffic safety in changed conditions that will appear with, for example, introduction of Autonomous Vehicles (AVs) in everyday traffic. In this paper, roundabout safety level is analysed on the originally developed microsimulation model in circumstances where different numbers of AVs vehicles are mixed with Conventional Vehicles (CVs). Field data about speed and traffic volumes from existing roundabouts in Croatia were used for development of the model. The simulations done with the Surrogate Safety Assessment Model (SSAM) give some relevant highlights on how the introduction of AVs could change both operational and safety parameters at roundabouts. To further explore the effects on safety of roundabouts with the introduction of different shares of AVs, hypothetical safety treatments could be tested to explore whether their effects may change, leading to the estimation of a new set of Crash Modification Factors.
Aleksandra Deluka Tibljaš; Tullio Giuffrè; Sanja Surdonja; Salvatore Trubia. Introduction of Autonomous Vehicles: Roundabouts Design and Safety Performance Evaluation. Sustainability 2018, 10, 1060 .
AMA StyleAleksandra Deluka Tibljaš, Tullio Giuffrè, Sanja Surdonja, Salvatore Trubia. Introduction of Autonomous Vehicles: Roundabouts Design and Safety Performance Evaluation. Sustainability. 2018; 10 (4):1060.
Chicago/Turabian StyleAleksandra Deluka Tibljaš; Tullio Giuffrè; Sanja Surdonja; Salvatore Trubia. 2018. "Introduction of Autonomous Vehicles: Roundabouts Design and Safety Performance Evaluation." Sustainability 10, no. 4: 1060.
The process of designing roundabouts is an iterative process through which in several checks the design elements of a roundabout get optimized. Existing regulations for roundabouts involves swept path analyses, sight distance analyses and speed analyses of vehicles passing through the roundabout. Speed analyses is done mostly based on two models, Dutch and American. Each of these two models, in their own way take into account design elements of the roundabouts, and the US model also envisions the construction of vehicle paths through the roundabout. Comparison of the measured speed at the roundabouts and speed calculated according to aforementioned models at several roundabouts in Croatia, showed a significant difference in the results of measured and calculated speed. An experimental research was conducted as a first step in developing a new model for operating speed through roundabouts. The research aimed to define the basic path elements of vehicle movement in the roundabout at which the maximum speed is achieved. Results of the study are presented in this paper.
Sanja Šurdonja; Vesna Dragčević; Aleksandra Deluka-Tibljaš. Analyses of maximum-speed path definition at single-lane roundabouts. Journal of Traffic and Transportation Engineering (English Edition) 2018, 5, 83 -95.
AMA StyleSanja Šurdonja, Vesna Dragčević, Aleksandra Deluka-Tibljaš. Analyses of maximum-speed path definition at single-lane roundabouts. Journal of Traffic and Transportation Engineering (English Edition). 2018; 5 (2):83-95.
Chicago/Turabian StyleSanja Šurdonja; Vesna Dragčević; Aleksandra Deluka-Tibljaš. 2018. "Analyses of maximum-speed path definition at single-lane roundabouts." Journal of Traffic and Transportation Engineering (English Edition) 5, no. 2: 83-95.
Heat islands are areas that have higher air temperatures than their surroundings. It has been proven that the use of certain types of pavement surface materials contributes to the occurrence of heat islands. The heat island effect is dominant in urban areas, mainly in city centres. To identify potentially favourable pavement surface materials that are suitable for the use on surfaces in urban areas, an extensive analysis of in-place material temperatures was conducted in the city centre of Rijeka (Croatia) during the summer of 2011 and 2012. The measurements included temperatures of pavement surfaces made of asphalt, concrete and stone. The analysis results identified local materials whose use help to reduce or mitigate the effect of additional heating in the urban environment caused by emission of heat from pavement surfaces. In terms of additional heating of urbanized areas, asphalt has proven to be significantly less favourable than other analysed materials. In addition to the materials selected for the use in wearing courses, their characteristics and the microclimates of the locations where they will be placed must be taken into consideration. Among the standard paving materials, in terms of heating and temperature, concrete is more favourable than asphalt because the differences between concrete surface temperatures and air temperatures are significantly smaller than between asphalt surface temperatures and air temperatures. Stone surfaces have proven to be the most favourable. The analysis results presented can be used to establish clear guidelines for using specific materials under specific conditions.
Aleksandra Deluka-Tibljaš; Sanja Šurdonja; Sergije Babić; Marijana Cuculić. Analyses of urban pavement surface temperatures. The Baltic Journal of Road and Bridge Engineering 2015, 10, 239 -246.
AMA StyleAleksandra Deluka-Tibljaš, Sanja Šurdonja, Sergije Babić, Marijana Cuculić. Analyses of urban pavement surface temperatures. The Baltic Journal of Road and Bridge Engineering. 2015; 10 (3):239-246.
Chicago/Turabian StyleAleksandra Deluka-Tibljaš; Sanja Šurdonja; Sergije Babić; Marijana Cuculić. 2015. "Analyses of urban pavement surface temperatures." The Baltic Journal of Road and Bridge Engineering 10, no. 3: 239-246.
Computer programs designed for traffic microsimulation have gained considerable popularity and widespread use, both in practical application as well as in research works. The number of traffic simulation models has increased...
Sanja Šurdonja; Daniela Nežić; Aleksandra Deluka-Tibljaš. The Roundabout Capacity Estimate Microsimulation Model. Journal of Maritime & Transportation Science 2015, 49-50, 143 -165.
AMA StyleSanja Šurdonja, Daniela Nežić, Aleksandra Deluka-Tibljaš. The Roundabout Capacity Estimate Microsimulation Model. Journal of Maritime & Transportation Science. 2015; 49-50 (1):143-165.
Chicago/Turabian StyleSanja Šurdonja; Daniela Nežić; Aleksandra Deluka-Tibljaš. 2015. "The Roundabout Capacity Estimate Microsimulation Model." Journal of Maritime & Transportation Science 49-50, no. 1: 143-165.