Although there have been a substantial number of critical dissections in recent years on how to improve the transportation planning process, most of them have been based on a piecemeal rather than on a holistic, systemic inquiry. This extended abstract represents an exploratory systemic formulation of an innovative framework to organize and steer the transportation planning process in the face of bounded rationality, unbounded uncertainty. There are other related issues, such as wicked problems, complexity, and conflict that will also be examined. A systemic inquiry is essential because the links connecting these problems to one another and to the planning process are not as clear as many imagine. Although we are strong in applying the principles of the natural sciences to planning, we are weak in understanding the related core social, economic, and cultural issues for dealing with an enlightened society. In fact, our current knowledge about the complexity of these issues and their interactions is anything but complete. The general prescriptive decision-making model used in the transport/land-use planning process, known as the Rational Planning Model (RPM), runs through five basic stages: 1. Identify objectives 2. Identify alternative courses of action 3. Predict consequences of actions 4. Evaluate the consequences, and 5. Select the alternative in accord with our criteria of efficiency. Whilst the RPM emphasizes 'scientific efficiency' through rational decisionmaking, the RPM has come under attack in the last three decades on the grounds that the model's basic assumptions are violated when it is applied in practice. In fact, a crisis in the methods and practice of transportation planning has been widely acknowledged, and probably the five most serious ones are those connected with the: rationality, uncertainty, 'wickedness', complexity, and conflict embedded in the planning process. What follows is a preliminary examination of the issues.

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AHP, Decision support system, Fuzzy system, Public participation, Transportation planning,

In transportation planning, design of intersections is required some concrete decisions. It is mostly related to capacity, safety and economy. In many applications, capacity is considered as the main factor for design purpose and type of intersection is determined regarding the capacity. But it is known that safety and economy are as important as the capacity. In order to handle this problem, a multi-criteria decision making approach (AHP) is used. Four intersection types are used. Fuel consumption, emission rates, delay, cost of intersection type and safety parameters are taken into account in the decision process. These intersection types are tested by SIDRA Intersection software using the parameters listed above. The data obtained by SIDRA software is used in the AHP model. Weights of the factors used in the AHP model are varied considering the views of capacity and economy. And results and applicability of the model are discussed.

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Öz: Düşük yakıt tüketimi ve elde edilebilirlik maliyeti motosiklet kullanımını gün geçtikçe popüler kılmaktadır. Yanlış ama alışıla gelmiş kullanım tarzı ile kendi trafik şeritleri üzerinde hareket etmek yerine taşıtlar arasında manevra yaparak yavaş ve rahatsız eden trafikten kaçınmaları bu ulaşım aracına görünür bir avantaj sağlamaktadır. Yol kullanım hakkını önemsemeyen bu alışkanlıklar trafik sıkışıklığına maruz kalmadan yolculuğu mümkün kılıyor olsa da bu durum kaza yapma olasılığını artırmakta ve ciddi yaralanmalar hatta ölümlerle sonuçlanan kazalara sebep olabilmektedir. Genelde kazalar açısından motosiklet diğer ulaştırma araçlarıyla birlikte değerlendirildiği için motosiklet kazalarıyla ilgili detaylı araştırmalar ülkemizde oldukça yetersiz kalmaktadır. Bu çalışmada Hatay merkez ilçesi Antakya"da 2005-2009 yılları arasında meydana gelen yazılı kaza raporları ile tutanak ekleri özel izin ile temin edilerek detaylı olarak incelenmiştir. Motosikletle ilgili olan kazalar ayıklanarak; kazaların oluş sebepleri araştırılmış ve bu veriler doğrultusunda elde edilen sonuçlara dayanarak mevcut durum değerlendirilmiştir.

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Public involvement in transportation planning and decision-making process is a key component for ensuring that decisions are made with consideration of public needs and preferences. In this paper, a weighted Euclidean distance based TOPSIS method (WEDTOPSIS) is developed for modeling such a public decision-making process. The Weber–Fechner psycho-physical law is adopted for behavioral modeling of human judgments. Distances to the positive-ideal and negative-ideal solutions of TOPSIS are converted to value measurement models using the Weber–Fechner law. The proposed method is applied on a case where public approval of two different types of public bus operation systems considering six criteria is sought. A numerical illustration is also provided to demonstrate the applicability of the approach. The method provides plausible results in terms of preferences, and shows a high agreement with the ordinary TOPSIS in terms of rankings. Another example showing disagreement on ranking is further analyzed to outline the discrepancies between the TOPSIS and WEDTOPSIS and to indicate the proposed model’s consistency with the behavioral theory. The results are also compared with the results of the additive multi-attribute value (MAVT) method for assessing the performance of the model. Based on the findings, using the proposed method as a decision support tool can be useful, particularly where public input is needed.