Achieving energy-efficiency and on-time performance with Driver Advisory Systems

Yang, Li; Lidén, Tomas; Leander, Per

doi:10.1109/icirt.2013.6696260

Cited by 19 publications

(10 citation statements)

References 3 publications

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“…Hence, for any planned headway greater than 5.1 minutes, it is possible to fix a corresponding number of convoys NC satisfying constraints (20) and then calculate turt in a closed form formulation by means of (23). Since the adoption of different split rates for layover times affects the value of min (as shown by (38)), we solved the optimisation problem (41) subject to (42) for identifying the minimum value of min to be compared with the planned headway so as to verify the feasibility test (37).…”

Section: Application Of the Proposed Methodologymentioning

confidence: 99%

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Defining Reserve Times for Metro Systems: An Analytical Approach

D’Acierno

Botte

Gallo

et al. 2018

Journal of Advanced Transportation

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The aim of this paper is to provide an analytical approach for determining operational parameters for metro systems so as to support the planning and implementation of energy-saving strategies. Indeed, one of the main targets of train operating companies is to identify and implement suitable strategies for reducing energy consumption. For this purpose, researchers and practitioners have developed energy-efficient driving profiles with the aim of optimising train motion. However, as such profiles generally entail an increase in travel times, the operating parameters in the planned timetable need to be appropriately recalibrated. Against this background, this paper develops a suitable methodology for estimating reserve times which represent the main rate of extra time needed to put ecodriving strategies in place. Our proposal is to exploit layover times (i.e., times spent by a train at the terminus waiting for the next trip) for energy-saving purposes, keeping buffer times intact in order to preserve the flexibility and robustness of the timetable in case of delays. In order to show its feasibility, the approach was applied in the case of a real metro context, whose service frequency was duly taken into account. In particular, after stochastic analysis of the parameters involved for calibrating suitable buffer times, different operating schemes were simulated by analysing the relationship between layover times, number of convoys, and feasible headway values. Finally, some operation configurations are analysed in order to quantify the amount of energy that can be saved.

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Section: Application Of the Proposed Methodologymentioning

confidence: 99%

“…The effectiveness of energy-efficient driving strategies was underlined in [19,20]. Interesting results were obtained in [21], where driving profiles were optimised by considering as constraints the operational requirements of railways.…”

Section: Railway Energy-efficient Drivingmentioning

confidence: 99%

Defining Reserve Times for Metro Systems: An Analytical Approach

D’Acierno

Botte

Gallo

et al. 2018

Journal of Advanced Transportation

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“…This resulted in high operating and energy costs, which in turn initiated the development of the Driver Advisory System (DAS) to support economic driving (Tschirner et al 2013). A DAS provides real-time information regarding the position of trains and gives advice on how to optimise traffic flow and energy efficiency by constantly suggesting updated speed limits with respect to time and distance to the next station (Yang et al 2013). This enables the drivers to adjust their driving behaviour to the overall traffic situation, which leads to increased quality of railway traffic in terms of safety, punctuality, comfort for the passengers, energy consumption etc.…”

Section: Research On Train Drivingmentioning

confidence: 99%

The coordination between train traffic controllers and train drivers: a distributed cognition perspective on railway

2018

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Although there has long been a call for a holistic systems perspective to better understand real work in the complex domain of railway traffic, prior research has not strongly emphasised the socio-technical perspective. In operational railway traffic, the successful planning and execution of the traffic are the product of the socio-technical system comprised by both train drivers and traffic controllers. This paper presents a study inspired by cognitive ethnography with the aim to characterise the coordinating activities that are conducted by train traffic controllers and train drivers in the work practices of the sociotechnical system of Swedish railway. The theoretical framework of distributed cognition (DCog) is used as a conceptual and analytical tool to make sense of the complex railway domain and the best practices as they are developed and performed "in the wild". The analysis reveals a pattern of collaboration and coordination of actions among the workers and we introduce the concept of enacted actionable practices as a key concern for understanding how a successfully executed railway traffic emerges as a property of the socio-technical system. The implications for future railway research are briefly discussed.

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“…Much of the literature concerning driving efficiency is based on models, commonly this is used in the development of a driver advisory system (DAS). 3 Although the use of a DAS will undoubtedly become widespread due to potential energy savings of 15-25% 4,5 , there are problems with effective implementation. Mitchel 6 shows an example of the difference in energy consumption between driver trajectories and a simulated optimal trajectory.…”

Section: Introductionmentioning

confidence: 99%

“…There are a number of reasons that may be responsible for this difference: they range from the complexity of the trajectory to driver priorities. Examples in Yang et al 4 describe optimized trajectory implementation on a mining route in northern Scandinavia. Two drivers, a 'good' one and a 'bad' one are compared as they attempt to follow a target trajectory.…”

Section: Introductionmentioning

confidence: 99%

Observations of train control performance on a camshaft-operated DC electrical multiple unit

Ellis

Weston

Stewart

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part F:

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In order to reduce energy consumption on DC railways where regenerative braking is not available, train control strategy or 'driver style' is a practical alternative. In 2011, instrumentation to monitor energy consumption on the Merseyrail network was fitted to a British Rail Class 508 DC camshaft-operated electrical multiple unit. In this paper, seven services from Hunts Cross to Southport are highlighted to demonstrate a number of driver styles and their correlation with energy consumption. The differences in energy consumption were observed to be related to driver aggression in both the acceleration and deceleration phases.

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Achieving energy-efficiency and on-time performance with Driver Advisory Systems

Cited by 19 publications

References 3 publications

Defining Reserve Times for Metro Systems: An Analytical Approach

Defining Reserve Times for Metro Systems: An Analytical Approach

The coordination between train traffic controllers and train drivers: a distributed cognition perspective on railway

Observations of train control performance on a camshaft-operated DC electrical multiple unit

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