نشریه فناوری حمل و نقل
پیاپی 30 (بهار و تابستان 1397)

Concerning the lack of budget to employ safety measures for all of the accident-prone roads, prioritization of accident-prone points helps us to have meaningful measures and investment efficiency increase. Hence, different techniques have been presented, with different methodologies based on their special hypothesizes. Because of the weakness in the establishment of the accident data bank, some of these methods have been channelized to the patterns in which the identification and prioritization process is independent from implementation of inefficient, incorrect and incomplete data. In this paper, it is tried to identify and prioritize the effective criteria in prioritization of accident-prone points including geometrical,physical and traffic characteristics, cost and number of accidents, using road safety experts’ view points and DEMATEL technique. In order to determine the extent of importance and effectiveness of factors to each other, some questionnaires were provided and the experts’ views were recorded. Through coding in MATLAB software, different phases of DEMATEL technique execution were done and the influence arrangement matrix was drafted. The results showed the cost criterion is the most effective factor on the other criteria and the number of accidents is the most impressionable factor from other criteria.

The purpose of this paper is to identify the expectations of commuter trains passengers and understand parameters that improving them has the greatest impact on the level of passenger satisfaction. In this study, using of the impact of each factor on the passenger satisfaction increase/decrease is calculated and then, the analytic results of KANO model have been used separately for detailed analysis and evaluation of service quality and measuring the satisfaction level. The present study can be considered as an applied research. Passengers’ need assessment is conducted through two times of survey by descriptive research method and data collection is performed through survey method. Two hundred passengers of Tehran commuter train were asked to answer the questionnaires for a week in the second half of December 2015; it was found that using the travel pass for passengers is more important than the other factors; the presence of modern equipment inside the train (particularly television), has the greatest impact on increase the passengers’ satisfaction. The staff willingness to help passengers, especially passengers who are disabled or handicapped, as well as the employees’ willingness to resolve the issues causing delay is also among the factors that enhance the passengers' satisfaction. Another contributing factor is the convenient access to the station using other modes of transportation that has the greatest impact on the passengers.

Bridges are vital infrastructures in the road and railroad networks which are inevitable in order to reach continuity in junctional points with the rivers or other roads. Building of important and major bridges is always costly which shows its maintenance importance. According to the type and of bridges, situation of the area and working materials, there are different types of deteriorations. Disregarding the prevention of deterioration creation or extension results in complete destruction of the bridges or makes them unsed which burdens huge loss. In this paper, using previous experiences and studies, different types of deteriorations are introduced, then the diversity of bridge deteriorations in Iran is defined. Finally, the audit results of a number of bridges located in Noor region (Mazandaran Province) are studied and different types of the deteriorations in the region are classified to introduce solutions to prevent creation and extention of deterioration.

Due to the high proportion of road transport in the country, passenger terminals have an important role in the movement of passengers between the cities. The main purpose of urban management in such organizations is improving the quality of service. The passenger terminals organization is one of the municipal services providers which are responsible for terminal services management. This study aims on the evaluation of the level of service in passenger terminals in Mashhad, comparing with three major cities in Iran, with approximate methods calculated area for passenger in passenger terminals of Mashhad. This calculation have been also estimated for the coming years, 2016, 2021 and 2031. The results showed that from the three terminals of Mashhad in 2015 (Imam Reza, Meraj and Rahe Abrisham), of Imam Reza and Meraj terminals are in class A and have standard space for equipment dedicated to the travelers. But Rahe Abrisham terminal needs to improve services and enhance space. In the long-term (2031), both terminals Meraj and Rahe Abrisham will need to change and improve the level of service.

Train timetabling and track maintenance scheduling are two important problems in two different parts of railway, having different aims. Optimal timetabling of trains usually aims at decreasing delays, and the more the time of accessing the lines, the easier the scheduling. Rail transportation authorities tend to use the lines the most in a day. On the other hand, track maintenance operators are also trying to facilitate the implementation of the maintenance and repairing; therefore, they tend to have the lines closed more, so that the time of accessing the lines to do this process will be more.Therefore, to confront the contradiction, we must take steps toward modelling and solving train timetabling and track maintenance scheduling problems simultaneously. Due to the importance of simultaneous scheduling of train movements and track maintenance problems, in this paper, first, the previous studies about train timetabling problems considering track maintenance time are proposed, and then we have concluded the studies, and also some suggestions for future studies are presented.

Regarding the transport issues and its increasing demand in metropolitans, especially during peak hours, and the fundamental role of the Information Technology (IT) to ease the urban life, introduction of new solutions for amelioration of traffic situation through these technologies is possible. This role within the ITS (Intelligent Transportation System) concept framework is very efficient in urban and interurban traffic control. In fact, ITS integrates information and communication technology to the vehicles and road networks through which passengers and freight are transported.
This paper aims at concepts, definitions, infrastructures and advantages of ITS and states the ITS situation in Iran and Tehran in brief. Iran needs ITS and implements this technology in some levels but the lack of ITS strategic plan in national level results in vulnerability of project progress and prevents to reach the expected result. Furthermore, concerning the need of ITS to technical knowledge in Traffic Transportation, ICT and organizational and management programs and strategies, it is required that planning and implementation of projects will be done by an appropriate experts of related fields.

One of the most important groups of heuristic algorithms is meta-heuristic algorithms which has been received much attention in recent years. Since these approaches are very efficient for escaping local optimum points, they are one of the best algorithms for solving operation research problems. This paper proposes a hybrid imperialist competitive algorithm called (IICA) in which a tabu list and several local search algorithms including the 1–0 exchange moves, the 1–1 exchange move and the 2-Opt move are used for improving performance of ICA. Furthermore, some of traveling salesman problems as one of the most important versions of the vehicle routing problem are considered for comparing this algorithm with other mataheuristic algorithms. Computational results on 13 standard benchmark problem instances show that the proposed algorithm is comparable in terms of solution quality to the other meta-heuristic algorithms