Browsing by Author "Atalay, Ahmet"

Now showing 1 - 8 of 8

Electric Car Sharing Stations Site Selection from the Perspective of Sustainability: A GIS-Based Multi-Criteria Decision Making Approach
(Elsevier, 2022) Kaya, Omer; Alemdar, Kadir D.; Atalay, Ahmet; Codur, Muhammed Y.; Tortum, Ahmet
It is undoubtedly that the environmental and economic benefits will increase by integrating electric vehicles, which are the vehicles of the future, with the car-sharing system. The problem of determining the locations of electric vehicle charging stations (EVCS) and service areas of the car-sharing system appear with the integration. Environmental and energy concerns are the biggest driving factor behind electric car-sharing systems. In this study, Geographic Information Systems (GIS) based fuzzy multi-criteria decision making (MCDM) method is proposed for the solution of site selection problems of electric car-sharing stations (ECSS). To do so, a three-step solution methodology is developed: (i) determining 20 sub-criteria and weighting the criteria with fuzzy Analytic Hierarchy Process (f-AHP), (ii) obtaining a suitability map for potential ECSS via GIS, (iii) sorting the performance levels of ECSSs assigned according to the suitability map by Elimination and Choice Translating Reality (ELECTRE). The proposed methodology is applied for Istanbul, a metropolitan city in Turkey as a case study. The results show that the most suitable areas for ECSSs in the European and Anatolian side, Istanbul is an intercontinental city, are the south-east part and south-western part, respectively.
Evaluation of Traffic Accidents Happening in Recent Years in Turkey
(Scientific Research Center Ltd Belgrade, 2016) Codur, Muhammed Yasin; Unal, Ahmet; Atalay, Ahmet
Throughout the world, in traffic accidents many people get injured or die. Even though the developed countries are able to fmd a partial solution to this problem, such a case continues to be a major problem in undeveloped countries. The number of traffic accidents in Turkey is increasing depending on the increase in the number of motor-vehicles. However, there may be different reasons for the increment of the number of traffic accidents. Countries are seeking a variety of methods to reduce the frequency of traffic accidents. One of the effective methods to reduce the casualty number of traffic accidents is the construction of divided highways. In this study, common traffic accidents happening in Turkey were evaluated and their causes and measures to be taken to reduce their frequency are investigated.
Geographical Information Systems Aided Traffic Accident Analysis Case Study: City of Erzurum North Ring Road
(Scientific Research Center Ltd Belgrade, 2014) Codur, Muhammed Yasin; Atalay, Ahmet; Tortum, Ahmet; Dogru, Ahmet Osgur
The population growth in developing World, technological development and urbanization is directly connected with the systems of transportation. Although transportation sector offers pretty much alternatives nowadays, people heavily prefer to highway transportation mode in the east of Turkey. The studies which have been done for providing road safety decrease traffic accidents. Geographical Information System (GIS) technology has been a popular tool for accident data and analysis of black spots in highways. Many traffic agencies have been using GIS for accident analysis. Accident analysis studies aim at the identification of high rate accident locations and safety deficient areas on the highways. A case study, using GIS aided traffic accident analysis for The North Ring Road of Erzurum/Turkey were developed by using the historical data, between 2005 and 2012. In conclusion, this study focused on the practicability of the GIS with the maps for traffic safety analysis.
Interdisciplinary Evaluation of Intersection Performances-A Microsimulation-Based MCDA
(MDPI, 2021) Alemdar, Kadir Diler; Tortum, Ahmet; Kaya, Omer; Atalay, Ahmet
Intersections are the most important regions in terms of urban traffic management. The intersection areas on the corridor should be analyzed together for consistency in traffic engineering. To do so, three intersections on the Vatan Street corridor in Istanbul, the most crowded city of Turkey, were examined. Various geometric and signal designs were performed for intersections and the most suitable corridor design was analyzed. The corridor designs were modeled with the PTV VISSIM microsimulation software. The most suitable corridor design was evaluated by using the results obtained from the microsimulation via analytical hierarchy process (AHP) and technique for order preference by similarity to ideal solution (TOPSIS) from multi criteria decision analysis (MCDA) methods. The evaluation criteria in the study are vehicle delay, queue length, stopped delay, stops, travel time, vehicle safety, CO emission, fuel consumption, and construction cost. As a result, the current and the most suitable alternative corridors were compared according to the comparison parameters and up to 80% improvements were observed. Thus, some advantages were obtained in terms of energy, environment, time, and cost.
Performance Evaluation of the ANN and ANFIS Models in Urban Traffic Noise Prediction
(Parlar Scientific Publications (p S P), 2017) Coduri, Muhammed Yasin; Atalay, Ahmet; Unal, Ahmet
Urban traffic is currently considered as one of the noise sources in the city of Erzurum province. As a disturbing sound, noise has several effects on environmental health and should be determined precisely in order to prevent or mitigate its effects in daily life in cities. This study aims to predict traffic noise in urban areas using with two well-known methods, artificial neural networks (ANN) and adaptive neuro fuzzy inference system (ANFIS). In order to compare the results of the methods same input data set consisting of total number of hourly vehicles, heavy vehicles, their average speeds were used in prediction process and 10 percentile exceeded sound level (L-10) were produced as the output of the models. Results of the study outlined that ANFIS model operated better than ANN model for the prediction of the noise originated by the urban traffic based on the statistical results, R-2 of ANFIS and ANN models were determined as 0.91 and 0.81 respectively. Additionally, this study concluded that the prediction of traffic noise under heterogeneous traffic which is mostly complicated with based on vehicle number, driver behaviors that causes to irregular pattern of factors.
Speed Violation Analysis of Heavy Vehicles on Highways Using Spatial Analysis and Machine Learning Algorithms
(Pergamon-Elsevier Science Ltd, 2021) Kuskapan, Emre; Codur, M. Yasin; Atalay, Ahmet
With the development of technology in the world, vehicles that reach high speeds are produced. In addition, with the increase of road width and quality, faster and more comfortable transportation can be provided. These developments also increase the speed violation rates of road vehicles. Drivers who violate speed limits can endanger both their own lives and the lives of others. Speed violations, of especially heavy vehicles, involve much greater risks than that of light vehicles. Heavy vehicles can cause more serious losses of lives and property in accidents, compared to the ones caused by light vehicles, as they can carry much more freight or passengers than light vehicles. In this study, data regarding the speed violations committed by heavy vehicles in Turkey, were used. Speed violations were divided into 10 classes according to the intensity of speed violation rates. After this process, all provinces were classified according to support vector machines (SVM), naive bayes (NB) and knearest neighbors (KNN) algorithms. When the accuracy values and error scales of all three algorithms are examined, it has been determined that the algorithm that gives the most accurate results is the NB algorithm. Based on the classification of this algorithm, speed violation density maps of types of heavy vehicles in Turkey were created by using spatial analysis. According to the density maps, the provinces with the highest speed violations were identified. In the results, it was determined that the rate of heavy vehicle speed violation was highest in the cities such as Erzurum, Konya, and Mug?la. Later, these cities were examined in terms of heavy vehicle mobility. At the end of this study, measures were proposed to reduce these violations in cities where speeding violations are intense. Material and moral damages can be prevented, to a great extent, with the implementation of recommendations of policymakers which can reduce speed violations.
Transportation Policies in Increasing Traffic Safety
(2018) Codur, M. Yasin; Ünal, Ahmet; Atalay, Ahmet
In our century, all economical social, cultural and touristic facilities are available through therapid, confident and satisfactory transporting. Transportation policies are of great importance interms of increasing productivity. Country's transport system plays an important role inrevitalizing the social, cultural and economic activities of countries. Therefore, the efficient useof resources, the rapid distribution of goods and services, the development of domestic andforeign trade will only be possible with careful planning of transport and the establishment of aregular transport network. It is desirable that the transport system to be selected for passengerand freight transport should be fast, economic, safe, and environmentally friendly systemssuitable for the country conditions. Transportation policies are determined in the direction ofthese expectations. Besides the positive results of transport systems, it brings some problems.The most important of these problems is related to traffic safety, which is also the main topic ofstudy. There are some studies on road safety in the World and in Europe. These studies; thedevelopment of new technologies, such as the provision of road signs and traffic penaltyanalogies, the restriction of alcohol content, the reduction of the number of lives lost in roadtraffic accidents, the development of electronic driving licenses, the limitation of intelligenttransportation systems and the speed of vehicles. The aim of this study is to examine the policiesto increase traffic safety. As a result of this study, the applications of the policies for trafficsafety and the deficiencies of the implementation point in the country of Turkey are determinedand suggested.
Turkey Railway Transport History and Policies
(City Net Scien Res Ctr Ltd-belgrade, 2018) Kaya, Omer; Kuskapan, Emre; Alemdar, K. Diler; Codur, M. Yasin; Atalay, Ahmet
The railways constructed and operated during the Ottoman Empire period were realized with the external capital that foreign entrepreneurs execute. Humanitarian Anatolia was introduced in 1856, 33 years after the first use of steam locomotives in the world. The total length of the railway network transferred to the Republic of Turkey, founded in 1923, it is 4,136 kilometers from the Ottoman Empire. During the period of 1923-1950, when railway transportation was considered as a state policy, a total of 3,764 kilometers of railways were built, average of 139 kilometers per year. Railways in this period were considered as a modernization project with all social aspects surrounding development and reconstruction. Due to seasonal problems, the railway was abandoned from 1950 to 2000. In these years when a recession period experienced, railways were completely neglected and only 945 kilometers of railways were built. Important investment projects to be put into practice after 2000 were planned and investment projects on railways were determined. Between 2004 and 2016, a total of 1,805 kilometers of railways were built an average of 138 kilometers per year. Currently, 4,053 km of railway is under construction. The studies that the country have carried out by focusing on the 2023 goals are now giving positive results. Efforts to increase the length of the railway network are under construction. Integration of the railway network with other transport systems must be ensured. It is aimed to reach the desired levels in railway freight and passenger transportation. Therefore, the study has presented suggestions about the improvement and development of Turkish railways and country policies.