American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 89)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-84 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

parts of the rail vehicle are detected. The signal system shall ensure that safe separation is

maintained between the parted vehicle and all other rail vehicles.

The minimum effective length of a track circuit shall be longer than the maximum inner

wheelbase of all vehicles used on this track.

For track circuits used to control signals and locking functions, the minimum shunt

sensitivity shall be 0.25 Ohms. The shunting requirements shall be met for ballast conditions

of 5 ohms per thousand feet or greater.

9.4.5.6 Broken Rail Detection

Broken rail detection shall be provided throughout. A broken rail shall de-energize the

associated track circuit.

9.4.5.7 Route Setting

There shall be three methods for control of train movement through the signalized sections.

9.4.5.8 Automatic Route Setting

Routes shall normally operate automatically by signal and switch control subsystems

responding to the approach of the train.

In normal operation, routes shall clear automatically for consists without intervention by the

train operator. At terminal stations trains shall be normally routed reverse across before

reaching the station as the preferred route, or the normal direction route if the preferred

platform is occupied.

9.4.5.9 Local Route Selection Capability

Local control capability shall be provided to ensure the safe operation of trains by means of

Local Control Panels (LCP) in each signal house.

The LCP shall indicate track circuit occupancy, signal status, switch position and

correspondence, switch locking, traffic direction, manual control, automatic control, and

crossing gate position.

9.4.5.10 Wayside Signals

9.4.5.10.1 Main line

Wayside color signals shall be provided to indicate movement authority, block occupation

and route locking information to train operators. Signals shall be installed to govern

movements into and through interlocking limits.

Wayside color signals shall show the following aspects, which are in compliance with Metro

rules:

Aspect

Meaning

Red Stop

Flashing Red STOP and contact ROC. Proceed when authorized by ROC.

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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 89