An energy-efficient train trajectory describing the motion of a single can be used as an input to driver guidance system or automatic control system. The solution for best is subject certain operational, geographic, and physical constraints. There are two types strategies commonly applied obtain trajectory. One allow coast, thus using its available time margin save energy. other one speed dynamically while maintaining required journey time. This paper proposes distance-based searching model,...

With daily commercial and social activity in cities, regulation of train service mass rapid transit railways is necessary to maintain passenger flow. Dwell-time adjustment at stations one commonly used approach service, but its control space very limited. Coasting a viable means meeting the specific run-time an inter-station run. The current practice start coasting fixed distance from departed station. Hence, it only optimal with respect nominal operational condition schedule, not demand....

Railway signaling facilitates two main functions, namely, train detection and control, in order to maintain safe separations among the trains. Track circuits are most commonly used means with simple open/close circuit principles; subsequent adoption of axle counters further allows trains under adverse track conditions. However, electrification power electronics traction drive systems, aggravated by electromagnetic interference vicinity system, railway engineers often find unstable or even...

The railway service is now the major transportation means in most of countries around world. With increasing population and expanding commercial industrial activities, a high quality desirable. Train usually varies with activities throughout day train coordination regulation are then expected to meet daily passengers' demand. Dwell time control at stations fixed coasting point an inter-station run current practices regulate metro systems. However, flexible efficient operation not always...

High reliability of railway power systems is one the essential criteria to ensure quality and cost-effectiveness services. Evaluation at system level for not only scheduling maintenance activities, but also identifying reliability-critical components. Various methods compute on individual components or regularly structured have been developed proven be effective. However, they are adequate evaluating complicated with numerous interconnected components, such as systems, locating critical...

With the increasing energy consumption in Chinese mainline railways amid worldwide carbon emission concerns, need for energy-efficient locomotive operation becomes urgent. Locomotive is directly linked to speed limits imposed by train ahead through signaling. In China's railways, change frequently because of relatively short headways a highly congested network. Whenever limit changes, must be determined again quickly adapt new limit. As result, real-time optimization problem with...

This paper presents a novel approach to road-traffic control for interconnected junctions. With local fuzzy-logic controller (FLC) installed at each junction, dynamic-programming (DP) technique is proposed derive the green time phase in traffic-light cycle. Coordination parameters from adjacent junctions are also taken into consideration so that organized extended beyond single junction. Instead of pursuing absolute optimization traffic delay, this study examines practical enable simple...

With the increasing concerns on energy consumption and operating cost in metro systems, saving train operation attracts significant attentions. Previous studies have mainly focused optimal control of a single energy-efficient timetabling. The former does not consider synchronization motoring braking trains, which cannot ensure proper utilization regenerative lines without storage systems. latter includes scheduling operations to synchronize trains for better energy. However, overlapping time...

System analysis within the traction power system is vital to design and operation of an electrified railway. Loads in systems are often characterised by their mobility, wide range variations, regeneration service dependence. In addition, feeding may take different forms AC railways. Comprehensive studies usually carried out computer simulation. A number simulators have been available they allow calculation electrical interaction among trains deterministic solutions network. paper, a approach...

Dwell times at stations and inter-station run are the two major operational parameters to maintain train schedule in railway service. Current practices on dwell-time run-time control that they only optimal with respect certain nominal traffic conditions, but not necessarily current service demand. The advantages of trains therefore fully considered. application a dynamic programming approach, aid an event-based model, devise set dwell for under given constraints over regional level is...

In major metropolitan cities, metro and intercity rail services usually share stations or have in close proximity to facilitate smooth connections for passengers. A large number of passengers may arrive on platforms within a short period time upon the arrivals trains, while drop significantly afterward. This injected passenger demand is not coped well by timetable with commonly adopted regular train headway. Focusing lines connecting railways, this study puts forward model optimize headways...

Last train coordination aims to synchronize the arrival and departure times of last feeder trains connecting at transfer stations improve accessibility urban rail networks. This study focuses on between with considering heterogeneous walking time. Three mathematical models are developed timetable optimization. The first model fine-tunes under given bound dwell second one allow mutual transfers prolonged time maximize accessibility. A biobjective function is proposed seek trade-off maximal...

In electrified railways, the traction power systems carry to trains and their reliability is vital quality of train services. There are many components in system, from interface with utility distribution network contacts trains, they physically located along rail line. Subject usage, environment, ageing, conditions deteriorate time. Regular maintenance has be carried out restore prevent them failure. However, decisions on suitable length intervals often lead railway operators dilemma...

Traffic conflicts at railway junctions are very common, particularly on congested rail lines. While safe passage through the junction is well maintained by signalling and interlocking systems, minimising delays imposed trains assigning right-of-way sequence sensibly a bonus to quality of service. A deterministic method has been adopted resolve conflict, with objective total weighted delay. However, computational demand remains significant. The applications different heuristic methods tackle...

Railway service is now the major transportation means in most of countries around world. With increasing population and expanding commercial industrial activities, a high quality railway desirable. We present an application genetic algorithms (GA) to search for appropriate coasting point(s) investigate possible improvement on fitness genes. Single multiple point control with simple GA are developed attain solutions their corresponding train movement examined. The hierarchical algorithm (HGA)...

Conflict occurs when two or more trains approach the same junction within a specified time. Such conflicts result in delays. Current practices to assign right of way at junctions achieve orderly and safe passage trains, but do not attempt reduce A traffic controller developed paper assigns impose minimum total weighted delay on trains. The flow model optimisation technique used this are described. Simulation studies performance given.

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In open railway access markets, a train service provider (TSP) negotiates with an infrastructure (IP) for track rights. This negotiation has been modeled by multiagent system in which the IP and TSP are represented separate software agents. One of tasks agent is to generate feasible (and preferably optimal) rights, subject constraints submitted agent. paper formulates IP–TSP transaction proposes...

Modern trams are developing fast because of their characteristics like medium capability and energy saving. Exclusive way is always set in practice to avoid interruption from general vehicles, while have stop at intersections frequently due signal rules the road network. Therefore, optimization has great effects on operational efficiency system. In this paper, an arterial coordination model proposed for progression based Asymmetrical Multi-BAND (AM-BAND) method. The AM-BAND modified...

Probab electrifi train s in pro system the po problem formulation and presents lin ovement corresponding power demand for load flow calculation.

: The maintenance of bridges as a key element in transportation infrastructure has become major concern due to increasing traffic volumes, deterioration existing and well-publicised bridge failures. main goal this study is develop requirement-driven decision support methodology for remediation concrete within acceptable limits safety, serviceability sustainability. proposed model includes two phases: Phase one focused on condition assessment priority ranking projects which makes use an...