H. Onur Tezcan

Istanbul Technical University · Department of Civil Engineering

This study investigated the underlying reasons for the improper use of bus bays in Istanbul, Turkey, one of the megacities in the developing world. Improper use occurs when a bus driver elects to enter a bus bay partially or not at all. Data were compiled from field studies during peak and off-peak hours at three selected bus bays on Buyukdere Stre...

This paper analyzes the passenger-carpooling potential among undergraduate students using a model for estimating choice based on combined revealed and stated preference data. The data are obtained from a survey performed at four campuses of Istanbul Technical University. The case in focus is carpooling as a passenger; carpooling as a driver is deli...

This study investigates the potential effects of parking pricing on the private vehicle use of residents of the campuses of large compounds such as universities. For this purpose, a parking pricing model is estimated for the academicians working at the Ayazaga Campus of Istanbul Technical University. Similar to many campus areas, the major problems...

The increase in motor vehicle use is one of the important factors that cause traffic congestion, especially in megacities. Thus, the reasons behind this increase require serious attention. This paper offers an analysis of this kind, for a megacity from the developing world, Istanbul. A stratified multinomial logit model accounting for the availabil...

Planned Special Event (PSE) is a public activity that has a defined location and time and has an influence on transportation system operations as a consequence of increases in travel demand or decreases in road capacity. Apart from the event itself, PSEs might generate additional activities based on location, time and duration of the event, and ind...

The purpose of the study is to evaluate the impacts of the variables on site selection decision of the spectators just before the main activity in order to engage in eating, having fun and performing other types of activities. A multinomial logit modelling framework is hired to model activity patterns within PSE circumstances. Activities were class...

When a planned special event (PSE) is mentioned, large and international organizations are considered. These organizations attract so many people all around the world to local points. However, relatively small scale PSEs such as ordinary league games that are organized once every two weeks that impact the daily traffic of the cities especially metr...

Kişilerin bütün bir ulaştırma sistemi algılarının yanı sıra, toplu taşıma türünü seçip seçmeme durumu kişinin toplu taşıma sistem algısı ile ilgilidir. Bu çalışmayla, kullanıcıların toplu taşıma sisteminin hangi özelliklerini nasıl algıladıkları, tür seçiminde hangi özelliğin daha etken olduğu ikili lojit modeliyle açıklanmaya çalışılmıştır. Bireyl...

A study of pedestrians crossing behavior is conducted at an uncontrolled mid-block crosswalk in Istanbul, Turkey, to model the pedestrians waiting time, related to their behavior for making the crossing decision. This article focused on the issues encountered in the modeling of the operational behavior of pedestrians. The discrete choice framework...

Although the four-step model is the most common method in transportation demand modelling, it is exposed to a considerable criticism in terms of representing the actual choice behaviours of travellers. For example, the four steps are presented in a fixed sequence and independently from each other. Such assumption may be correct in case of obligator...

Despite traditional four-step model is the most prominent model in majority of travel demand analysis, it does not represent the potential correlations within different travel dimensions. As a result, some researches have suggested the use of choice modelling instead. However, most of them have represented travel dimensions individually rather than...

Introduction: This study investigated the pedestrian crossing behavior at midblock crosswalks, in Istanbul. Method: Data were compiled from field studies at four selected crosswalks that were on one-way streets. Three of the crosswalks were located on three-lane streets while the other one was on a two-lane street. By using two-hour video record...

This paper aims to introduce a new modelling approach that represents departure time, destination and travel mode choice under a unified framework. Through it, it is possible to overcome shortages of the traditional 4-step model associated with the lack of introducing actual travellers' behaviours. This objective can be achieved through adopting di...

This paper aims to examine the inter-relationship (dependency) between departure time, destination and transportation mode alternatives of discretionary trips under a single unifying framework. This can be achieved through developing a number of two-level Nested Logit models that can incorporate different correlation structures. The proposed models...

Traffic congestion is one of the most significant problems that face most cities around world. That leads governments to dedicate huge investments on policies that aim to mitigate and manage it. One of these policies is increasing travel cost at specific times within specific regions to force people avoid using private vehicle or completely avert t...

Urban rail systems are considered as safe, fast and sustainable systems because traffic and pedestrian intersection areas are less than those of rubber-tired public transportation systems. Although metro and light rail systems with high capacity and completely independent lines in the city are the safest and reliable systems because they do not int...

Importance given to transportation investments increase in developed countries day by day. Therefore, effective planning plays a significant role either in new transportation investments or in improving present transportation system. To make well-conceived planning for urban transportation, mode choices (automobile, taxi or public transport) and tr...

In many cities, different developments in economic, social, and physical environment significantly influence the transportation demand. When the demand could not be matched by capacity expansions, sustainability is tried to be attained via various demand management strategies. In this study, optimization of the commuting trips for demand management...

Kent içi toplu taşıma sisteminin önemli parçasını oluşturan otobüs sisteminde, genelde iki tip durak ile yolcuların iniş/binişleri sağlanmaktadır. Bunlar, otobüslerin yol içinde ve yol dışında durdukları durak tipleridir. Otobüsler yol içinde, sağ şeridin sağında durduklarında mevcut trafik akımını etkilemektedirler. Bu etkilenmeyi azaltmak için yo...

Traffic congestion is one of the major problems of large metropolitan cities. Apart from recurrent congestion that is a regular disturbance for inhabitants of these cities; irregular congestion borne by issues such as traffic incidents or special events is another aspect in this context. The focal point of this paper is the special events which are...

Istanbul is one of the most famous megacities in the world and is the third largest metropolitan area in Europe. It can be deemed as an alpha world city and is the unique city in the world, where Asia and Europe collide. The city is the cultural, economic, financial center and urban agglomeration of Turkey, where a plethora of public transport impr...

The aim of this study is to understand the reasons behind the mode choice preferences of passengers using a public transport transfer center. For this aim, a questionnaire data obtained at an interim transfer center in Istanbul is utilized. This interim center hosts stops for paratransit, bus and metro modes. A multinomial logit model of modal pref...

This study estimates a stratified multinomial logit mode choice model of the trip preferences of academicians employed at the Ayazaga campus of Istanbul Technical University. The mode choice model contains three alternatives that are dominantly preferred among academicians: private vehicle, public transport, and service vehicle modes. The data are...

The aim of this paper is to present the basic premises of modelling road pricing with an engineering perspective at aggregate and disaggregate levels. An engineering perspective is different than economic perspective according to its analytical and deterministic approach. In this paper most of the economic notions are deliberately simplified, espec...

Suburban rail transport is essentially important for cities with peripheral residency. Istanbul has such a character. Currently servicing suburban rail system of the city serves not only serves for people living at the peripheries but also for residents of the several urbanized regions of the city as well. Obviously, recent decision to stop the ope...

Road pricing is an effective tool for traffic demand management policies. In general, road pricing is implemented either for revenue maximization or for regulating transportation demand. Moreover, adverse unfavourable impacts of several transportation related negative externalities suchlike noise, air pollution and/or accidents can be diminished wi...