Hakan Guler

Sakarya University · Department of Civil Engineering

Temir yo’llarida ta’mirlash va takomillashtirish (TT) ishlari juda ham muhim bo’lib, bu faoliyatga jalb qilinadigan mablag’larning yuqori qurulma ishlariga katta sarmoya ulushi teng kelsihsini ko’rmoqdamiz. Bu sarmoyalarni eng maqbul saviyaga tushirish temir yo’llari yuqori qurilmasi tizimida muhum ro’l kasb etadi. Temir yo’llariga ko’rsatiladigan...

zet Demiryolları, üretim endüstrisi ile taşımacılık sektörleri arasında bağlantıyı ve ekonominin sürekli işleyişini sağlayan önemli bir ulaşım aracıdır. Demiryolu ulaşımında güvenli ve emniyetli işletmecilik yolcu ve yük taşımacılığı için çok önemlidir. Bu durum dünyada yaşanan demiryolu kazaları ve kazaların sebep olduğu olumsuz sonuçların etkisi...

Reliable, available, maintainable and safe operation in railway transportation is significant for passenger and freight transportation. For these reasons, European Union put into practice a standard in 1999 known as EN 50126 to prevent railway accidents and to ensure a high level of safety in railway operations. The EN 50126 standard consists of th...

Reliable, available, maintainable and safe operation in railway transportation is significant for passenger and freight transportation. For these reasons, European Union put into practice a standard in 1999 known as EN 50126 to prevent railway accidents and to ensure a high level of safety in railway operations. The EN 50126 standard consists of th...

This paper describes a new approach to optimisation of railway track maintenance and renewal works via genetic algorithms. Decision support systems and genetic algorithms are used in this study to optimise railway track maintenance and renewal activities. The results obtained in the scope of this study show that planned maintenance and renewal mana...

The condition of railway infrastructure elements is the key factor influencing the traffic safety, infrastructure availability, total maintenance and renewal costs, and revenues. The measurement and analysis of the condition of railway infrastructure elements is the only correct approach enabling an efficient monitoring of their behaviour and prope...

Istanbul, the only city that straddles two continents, Europe and Asia, is one of the biggest metropolitan areas in the world with over thirteen million residents. The demand for transportation in Istanbul has been boosted considerably due to the increasing population and rising vehicle ownership. On the other hand, the transportation infrastructur...

The main goal of this paper is to model track geometry deterioration using a comprehensive field investigation gathered over a period of 2 years on approximately 180 km of railway line. Artificial neural networks (ANNs) were adapted for this research. The railway line was divided into analytical segments (ASs). For each AS, the following data were...

This paper presents a framework which includes empirical modelling methods to estimate freight transportation between defined zones. In this method, observed origin and destination matrices for each type of freight are constituted based on the link counts and the roadside truck survey data. The gravity method is selected to estimate origin and dest...

Transportation is an important human activity which has many economic, social and other effects. In particular, freight transportation is economically very important for any country, and includes transporting a wide variety of goods ranging from raw materials to finished goods. These freights must be transported to the market efficiently and safely...

This paper describes a decision support system approach for railway track maintenance and renewal management system to analyze the track components and to suggest methods for helping the track managers and engineers decide when maintenance is necessary and when is the best time for renewal. In this study, interviews with track maintenance experts,...

Increasing demand for railway transportation requires large amounts of money to be spent on maintenance and renewal. In both industrialised and developing countries, one of the main problems of railway companies is regarding track maintenance and renewal. Cost reduction and better control of maintenance processes therefore increase the efficiency o...

The main goal of this paper is to evaluate civil engineering internship programs for educational improvements by doing statistical analyses on comprehensive survey data gathered from inquiry sheets. A web base online survey tool was prepared and 251 inquiry sheets were statistically analyzed. Univariate analyses were performed to describe the inter...

Understanding track geometry deterioration decisively influences the planning and optimisation of track maintenance and renewal works and consequently the substantial related costs (savings) each year of every railway. To understand this deterioration it must be accurately modelled, paving the way towards its forecasting into the future. The main a...

Railway demand for freight and passenger transportation has been continuously increasing for along time. It is crucial to meet that demand with an efficient railway infrastructure asset management system using the railway resources cost-effectively. Asset management system requires extensive and integrated information of railway assets. The essence...

It is wise to obtain a management system (Railway Asset Management System) related with railway assets for keeping the railways in effective and beneficial manner as in the other transportation systems. The decision makings especially in long term strongly require an under control track geometry. It is necessary to determine deterioration of track...

The assets that consist of railway track components and facilities must be managed by using appropriate management systems such as asset management systems (AMS). In recent years, modern railway technologies which are recording vehicles, remote sensing technologies (airborne photo, airborne laser) and Global Positioning System enable managers to st...

The associations working on transportation fields use available data to define the goals and target related with services or facilities purposes. Asset Management Systems (AMS) concept is important on transportation field and it cover facilities, infrastructure and superstructure components of the transportation systems. Costs of permanent way and...

The assets that consist of railway track components and facilities must be managed by using appropriate management systems and tools. Thus the term of asset management systems (AMS) was begun to use for realizing efficient railways. The discrepancy between the actual and required accuracy, having in mind the extremely large extent of the railroad n...

Using conventional methods based on home surveys or roadside interviews disrupting traffic in order to estimate origin-destination (O/D) matrices is generally costly, time consuming, and labor intensive. The validity of data is very short in developing countries like Turkey, where rapid changes occur in land use and demographic structure, and it is...

It is important to constitute a detailed, easily understandable, and visually appealing database related to rail freight transportation for carrying out various analyses, making more effective operational plans, and finding solutions for many management problems. Hence, in this paper, the rail freight transportation in Turkey is analysed, giving a...

In this study, the surface water data of Istanbul, such as water supplies, water treatment plants, raw and treated water quality parameters, map and general data were transferred into Geographic Information Systems (GIS) in order to establish a new water monitoring network. GIS technologies are further utilised in the formulation of the water monit...

Comfort, safety, transit times and reliability are important factors for any transportation system. If we want railways to be compatible with the other transportation systems, we must ensure these important parameters at minimum cost levels. Some of the main problems of railways companies are the track maintenance and renewal (M&R) because of the c...

SUMMARY The associations working in the field of transportation use available data to define the goals and targets related with services or facilities' purposes. The concept of Asset Management Systems is important in the field of transportation and it covers facilities, infrastructure and superstructure components of transportation systems. Due to...

4 Abstract: The main aim of this paper is to evaluation of a transportation plan strategy for Turkey. For this reason, the objectives, principles and policies are explained at the beginning of the paper. Then, the strengths, weaknesses, opportunities and threats of the transportation plan strategy are clarified using SWOT analysis. At the end of th...

In this paper, a genetic algorithm based decision support system is designed for parameter analysis to decide the correct maintenance and renewal method for the optimization of railway track maintenance and renewal activities. Genetic algorithms, which are strong adaptive optimization methods based on biological principles, were used to determine t...