An Effective Improvement to Main Non-periodic Train Scheduling Models by a New Headway Definition

Jafarian-Moghaddam, Ahmad Reza; Yaghini, Masoud

doi:10.1007/s40996-018-0212-2

Cited by 2 publications

(3 citation statements)

References 22 publications

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“…According to Jafarian-Moghaddam and Yaghini [54], the proposed model defines the headway in interval (s, s ? 1) (h ðs; sþ1Þ ) as the time interval required for safe entry of the next train to the block section.…”

Section: Constraints Of the Safe Movement Of Trainsmentioning

confidence: 99%

“…1) (h ðs; sþ1Þ ) as the time interval required for safe entry of the next train to the block section. This new headway definition can reduce the number of model constraints [54]. Different modes of trains' entry to the block can include Fig.…”

Section: Constraints Of the Safe Movement Of Trainsmentioning

confidence: 99%

“…1) = 0 if the outbound train j is first passing through the block; otherwise, B ij(s, s ? 1) = 1 [54]. It should be noted that constraint 13 will be eliminated from the model if there are separate routes for passing trains.…”

Section: Constraints Of the Safe Movement Of Trainsmentioning

confidence: 99%

See 2 more Smart Citations

Economical Speed for Optimizing the Travel Time and Energy Consumption in Train Scheduling using a Fuzzy Multi-Objective Model

Jafarian-Moghaddam

2021

Urban Rail Transit

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Speed is one of the most influential variables in both energy consumption and train scheduling problems. Increasing speed guarantees punctuality, thereby improving railroad capacity and railway stakeholders’ satisfaction and revenues. However, a rise in speed leads to more energy consumption, costs, and thus, more pollutant emissions. Therefore, determining an economic speed, which requires a trade-off between the user’s expectations and the capabilities of the railway system in providing tractive forces to overcome the running resistance due to rail route and moving conditions, is a critical challenge in railway studies. This paper proposes a new fuzzy multi-objective model, which, by integrating micro and macro levels and determining the economical speed for trains in block sections, can optimize train travel time and energy consumption. Implementing the proposed model in a real case with different scenarios for train scheduling reveals that this model can enhance the total travel time by 19% without changing the energy consumption ratio. The proposed model has little need for input from experts’ opinions to determine the rates and parameters.

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Section: Constraints Of the Safe Movement Of Trainsmentioning

confidence: 99%

Section: Constraints Of the Safe Movement Of Trainsmentioning

confidence: 99%