Mohammad Maghrour ZefrehKTH Royal Institute of Technology | KTH · Department of Civil and Architectural Engineering - Division of Transport Planning
Mohammad Maghrour Zefreh
Ph.D. in Transportation Engineering
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30
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Publications (30)
Public transport service (PTS) analysis and provision is an important and challenging issue for public transport agencies. The results of the PTS analysis help transport planners to identify the areas in need of PTS improvement. Furthermore, relevant policy actions need to be determined for service provision to reach the desired level of PTS improv...
Recently, in the literature, microscopic simulation is one of the most attractive methods in impact assessment of automated vehicles (AVs) on tra c ow. AVs can be divided into di erent categories, each having di erent driving characteristics. Hence, calibrating microscopic simulators for di erent AV categories could be challenging in AVs' impact as...
Different types of automated vehicles (AVs) have emerged promptly in recent years, each of which might have different potential impacts on traffic flow and emissions. In this paper, the impacts of autonomous automated vehicles (AAVs) and cooperative automated vehicles (CAVs) on capacity, average traffic speed, average travel time per vehicle, and a...
This paper investigates the intention to use private autonomous vehicles (PAVs) in developed and developing countries. Self-efficacy, the attitude toward using PAV technology, and the trust in PAV constructs are integrated into an extended Unified Theory of Acceptance and Use of Technology (UTAUT2) model to increase the understanding of users' perc...
External costs that are associated with air pollution, climate change linked to greenhouse gas emissions (GHG), and noise are among the most important environmental externalities that are generated by road transport, which have been well monetized. This paper theoretically investigates the effects of different traffic conditions on the environmenta...
This paper proposes an approach to district-level urban public transport accessibility analysis. In this approach, public transport accessibility is evaluated at the district-level through an AHP-TOPSIS and finite mixture modelling framework. The results might help to identify which districts need improvement, and what type of improvement policies...
Recently, the impact assessment of automated vehicles (AVs) has received considerable interest among the researchers due to the AVs' potential mobility benefits. Microscopic simulation is one of the most attractive methods of investigating the AVs' impacts on road traffic flow in the literature. AVs can be divided into different categories each of...
Improvement in the understanding of the main drivers of passenger satisfaction with public transportation (PT) is crucial for increasing the attractiveness of the PT. This study explores the main drivers of satisfaction with PT and their interactions by training the PT satisfaction forest. The results of the random forest in-depth analysis show PT...
Road pricing is an efficient instrument to regulate use of roads. In Budapest, Hungary, only cordon pricing has been investigated in detail. This paper reports on a study of the implications of applying different road pricing schemes in the city using a macroscopic traffic model. Firstly, the functional relationship between pricing schemes and road...
Fundamental diagram, a graphical representation of the relationship among traffic flow, speed, and density, has been the foundation of traffic flow theory and transportation engineering for many years. Underlying a fundamental diagram is the relation between traffic speed and density, which serves as the basis to understand system dynamics. Empiric...
The modern transportation system is walking step by step toward automation. As automated technology continues to develop, the new technology offers a considerable opportunity to enhance public transportation systems especially in the development and promotion of the sustainable mobility concepts. The driverless public transportation can only become...
Improvement in the understanding of the main drivers of passenger satisfaction with public transportation (PT) is crucial for increasing the attractiveness of the PT. This study explores the main drivers of satisfaction with PT and their interactions by training the PT satisfaction forest. The results of the random forest in-depth analysis show PT...
Automated vehicles (AVs) are one of the emerging technologies that can perform the driving task themselves. The market penetration of AVs is expected to get growth in the close future. Therefore, it is crucial to have an overall clue on how they play the role in the road transportation sector. Automation might be assumed to have a beneficial impact...
Road transport generates negative externalities including air pollution, congestion, accidents, noise and climate change linked to Greenhouse Gas emissions (GHG). In the current paper, the role of vehicle's internal combustion (IC) engine type in the environmental external costs of road transport has been highlighted such that the potential air pol...
Road traffic noise is one of the most relevant sources in the environmental noise pollution of the urban areas where dynamics of
the traffic flow are much more complicated than uninterrupted traffic flows. It is evident that different traffic conditions would play the role in the urban traffic flow considering the dynamic nature of the traffic flow...
Incessantly increasing urbanization is a threat to mobility, environment and ultimately to the quality of life. Promoting public transport in the major cities seems to be a promising solution to this issue which can be achieved by moving toward attracting more satisfied public transport passengers (PTP). The first step in PTP satisfaction analysis...
Accessibility is one of the most important outcomes of the transportation system. Public transport can be more attractive by providing “Door to door mobility” and development of transportation services is an important factor of social quality. Public transport accessibility has gained vital importance in designing and evaluating the transit system...
The data derived from loop detectors are of great importance in terms of traffic monitoring and analysis. These data may contain many holes or incorrect values due to equipment malfunctions and communication faults that may produce unreliable results. These holes (missing samples) or incorrect values (bad samples) might be problematic for any algor...
The length of vehicles is one of the most important parameters in traffic flow modeling and traffic control in many aspects such as speed estimation using the outputs of single loop detectors, length based vehicle classification and density estimation. In the current study, the average length of vehicles in two-lane urban roads of Budapest, Hungary...
This paper analyses the effect of supporting the public transport policy based on intersection controlling with the aim of tram priority in Budapest, as a case study. The hypothesis related to this study was that the support of public transport is only viable when the marginal benefit of public transport is higher than the marginal cost of individu...
Vehicles speed distribution is an important input parameter in lots of issues, such as kinematical traffic simulation model, road design, speed limit evaluation, road traffic noise prediction as well as vehicles emission estimation. In this paper, a new approach has been presented in which the speed is randomly generated according to different unim...
Vehicles speed distribution is an important input parameter in lots of issues, such as kinematical traffic simulation model, road design, speed limit evaluation, road traffic noise prediction or vehicles emission estimation. In this paper, a new approach has been presented in which the speed is randomly generated according to different speed distri...
In recent years, road transport models have developed for better estimation of road traffic emissions with higher and higher temporal and spatial resolution, to be used as a tool in air quality management for the better living. Road transport related emission models are becoming more and more complex. In this paper, the key research question is how...
The sudden maneuver of shared taxi through lanes in order to pick-up and drop-off passengers and asking their destinations -due to lack of designated stop locations- may lead to disorder in traffic flow. The main hypothesis in this research was that shared taxis sudden maneuvers and lane changings have negative effects on traffic flow characteristi...
Underlying a fundamental diagram is a relation between traffic speed and density which roughly corresponds to drivers’ speed choices under varying car-following distances. Stochastic and deterministic models are mainly two different categories of speed-density models. The advantages of deterministic models are their mathematical simplicity and anal...
Shared taxi is a mode of public transportation used in Iran. Fixed route, unscheduled operation, unlimited pickup and dropoff locations, lack of designated stop locations, and share ride are common features of shared taxi therefore, shared taxis are the semiflexible way of passenger transport. These taxis often influence the traffic flows with sudd...
In Iran, shared taxis are playing significant role in public transport. Maneuver of shared taxi through lanes in order to pickup and drop-off passengers and asking their destinations may lead to disorder in traffic flow. In order to investigate the effect of these maneuvers (or sudden lane changing) on traffic flow, it is essential to simulate thes...