[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

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[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

Chapter 5Metro5.1DEFINITION AND DESCRIPTION OF THE SYSTEMThe metro, or metropolitan, or sometimes termed as “underground railway” (Figure 5.1). is a s

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)system which exclusively uses electric traction and usually uses the traditional steel wheel on a rail guidance system (though sometimes rubber-tyred

wheels arc used. Figure 5.2), on an exclusive corridor, the largest part of which is underground and in any case is grade separated from the rest of t [Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

he urban road and pedestrian traffic.In relation to other urban transport modes, the system is characterised by•High-frequency service (train headway

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

up to 1 min)•Large transport capacity (up to 45,000 passengers/h/direction) (Bieber, 1986)•Movement, to a large percentage or the entire length, on an

Chapter 5Metro5.1DEFINITION AND DESCRIPTION OF THE SYSTEMThe metro, or metropolitan, or sometimes termed as “underground railway” (Figure 5.1). is a s

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)n decades)From an engineering point of view, it is a very complex and challenging project as it requires specialised knowledge regarding a variety of

engineering disciplines (soil mechanics, structural mechanics, transportation engineering, architecture, power supply systems, low-voltage telecommuni [Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

cation systems, trackwork technologies, automated control systems, rolling stock technologies, computer systems, etc.).5.2CLASSIFICATION OF METRO SYST

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

EMS5.2.1Transport capacityBased on the passenger volume they serve, metro systems are classified as follows:•Heavy metro•Light metroThe light metro is

Chapter 5Metro5.1DEFINITION AND DESCRIPTION OF THE SYSTEMThe metro, or metropolitan, or sometimes termed as “underground railway” (Figure 5.1). is a s

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)ighter vehicles and shorter distance between intermediate stops. It is commonly selected for the service of cities with a population between 500.000 a

nd 1,000,000 inhabitants. On the other hand, the construction of heavy metro is more appropriate for cities with a population greater than 1,000,000 i [Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

nhabitants.161162 Railway Transportation SystemsFigure 5.1 Athens metro system (steel wheels, driver). (Photo: A. Klonos.)Table 5.1 compares some key

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

constructional and functional characteristics of the two types of metros mentioned above.5.2.2Grade of automation of their operationBased on the grade

Chapter 5Metro5.1DEFINITION AND DESCRIPTION OF THE SYSTEMThe metro, or metropolitan, or sometimes termed as “underground railway” (Figure 5.1). is a s

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)rhe operational characteristics which determine the GoA for each category (Rumsey, 2009).More specificallyGoAl: Operation with a driver - The driver o

f the train is actively involved throughout the driving activity. The train is only equipped with Automatic Train Protection (ATP) system.Figure 5.2 L [Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

ausanne metro system (rubber-tyred wheels - driverless). (Adapted from Amort. J. 2006. available online at: http://en.wikipedia.org/wiki/Rubber-tyred_

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

metro#/media/File:Rame_m2_laus-anne.JPG (accessed 7 August 2015).)Metro 163Table 5.1 Heavy mctro/light metro: Basic differences as regards their const

Chapter 5Metro5.1DEFINITION AND DESCRIPTION OF THE SYSTEMThe metro, or metropolitan, or sometimes termed as “underground railway” (Figure 5.1). is a s

[Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)Grade separationPartial (at grade and underground)Mainly undergroundMaximum transport capacity35.000 passcngcrs/h/dircction45.000 passcngcrs/h/directi

onTrain formation2-4 vehicles4-10 vehiclesTrain length60-90 m70-150 mVehicle width2.10 2.65 m2.60 3.20 m [Pyrgidis,_Christos_N]_Railway_transportation_syst ( F 2)

Chapter 5Metro5.1DEFINITION AND DESCRIPTION OF THE SYSTEMThe metro, or metropolitan, or sometimes termed as “underground railway” (Figure 5.1). is a s