Aims and Scope
Recent Articles
Sustainable Public Transportation Evaluation using a Novel Hybrid Method Based on Fuzzy BWM and MABAC
Mehdi Keshavarz-Ghorabaee, Maghsoud Amiri, Mohammad Hashemi-Tabatabaei, Mohammad Ghahremanloo
Background:
The transportation sector has wide-ranging effects on the human societies. Public transportation has a key and undeniable role in the lives of people in society and affects important aspects such as economic, social, cultural and environmental. Therefore, assessing the sustainability of public transportation in urban areas can be considered as a challenge for transportation policy makers.
Methods:
In this study, a novel hybrid multi-criteria decision-making (MCDM) method is proposed to evaluate sustainable public transportation in Tehran. Evaluation criteria have been identified using the literature and experts’ opinion. The proposed method integrates the fuzzy best-worst method (FBWM) and the multi-attributive border approximation area comparison (MABAC) method. a group of three experts determined the weight and importance of each criterion using FBWM. The MABAC method was then used to rank sustainable public transport alternatives.
Results:
The results indicate the reliability of the proposed method. Also, we can see that the results are congruent with the actual conditions of public transportation. The studied alternatives have been evaluated, and according to the decision criteria, metro and e-hailing have been the most sustainable alternatives. It is noteworthy that the economic and financial sustainability, service availability and environment sustainability have been the most important criteria.
Conclusion:
The proposed framework in this study can be used by public transportation planners and policy makers to identify sustainable options in order to consider facilities and implement incentive policies in this field. Also, the results of the proposed method used in this study can be used as a suitable guidance to assess the sustainability of public transportation.
April 16, 2021
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- March 17, 2021
Intelligent Transportation Systems along with the COVID-19 Pandemic will Significantly Change the Transportation Market
February 15, 2021
The Effect of Modifying Double Continuous Flow Intersections Layout Geometric Features on their Operation
April 16, 2021
Organization Leadership in the Automobile Industry: Knowledge Management and Intellectual Capital
Editor's Choice
Bridge Safety Analysis Based on the Function of Exceptional Vehicle Transit Speed
Roberto Ventura, Benedetto Barabino, David Vetturi, Giulio Maternini
Background:
The road management agencies often prescribe very low-speed limits for exceptional vehicles transiting on the deck. These restrictions aim to reduce the dynamic effects due to the vehicle-bridge interaction because it is assumed that these effects increase with speed. However, sometimes, a reduction in speed increases the encounter probability of two exceptional vehicles travelling in opposite directions and this could compromise the safety of the bridge when the total masses of both vehicles exceed the bridge bearing capacity (or limit mass).
Objective:
While the literature has investigated the encounter probability in a theoretical way and has investigated the vehicle-bridge interaction, especially in terms of dynamic load increment, to the best of our knowledge, no study has investigated the conjunction probability of encounters and of exceeding the limit mass also by using real data. This paper aims to cover this gap by proposing an integrated model that computes the “Annual Probability of Failure” of the bridge, defined as the likelihood to exceed the “Limit Mass" of the deck when two opposite exceptional vehicles encounter.
Methods:
According to the probability theory, the “Annual Probability of Failure” can be obtained by multiplying the likelihood that during the reference year, at least once, two exceptional vehicles, travelling in two opposite directions (ascendant and descendant), will be simultaneously on the bridge deck (“Annual probability of encounter”) with the likelihood that the sum of the single masses of two exceptional vehicles randomly extracted from the sample, including the dynamic effects, exceeds the limit mass ml (“Probability of exceeding the limit mass”).
Results:
The results show that the probability of encounter increases with both the exceptional vehicles flow rate and the length of the span, whereas it decreases with the passing speed. The probability of exceeding the limit mass increases with speed. Nevertheless, by combining both the probabilities, these results suggest the existence of an “Optimal Speed”, which minimizes the “Annual Probability of Failure”.
Conclusion:
The existence of an “Optimal Speed” should be considered when defining the exceptional vehicle transit rules on bridges as well as the speed limit.
December 31, 2020
Other Post
- September 30, 2019
Travel-time Prediction Using K-nearest Neighbor Method with Distance Metric of Correlation Coefficient
January 18, 2018
Effect of Traffic Flow, Proportion of Motorcycle, Speed, Lane Width, and the Availabilities of Median and Shoulder on Motorcycle Accidents at Urban Roads in Indonesia
January 22, 2018
A Simulation Model to Determine the Capacity of a Y-Type Waterway Intersection for a Real Seaport
January 29, 2018
Effectiveness of Experimental Left-Turn Sign Usage in Terms of Crashes and Analyzing Severity of Left Turn Crashes in Alaska
January 29, 2018
Collisions Between Pedestrians and Reversing Vehicles in Public Settings in France
February 28, 2017
Impact of Integrated Multimodal Traveler Information on Auto Commuter’s Mode Switching Propensity
