American Audio VELOCITY - REV 4-05 Operations Instructions download pdf (Page 52)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-47 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

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

train operator. At terminal stations the train operator shall be able, via TWC, to request that

the departing signal be cleared for the train to proceed. 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.

The ATC system shall use train ID, transmitted by the TWC system, in order to

automatically route trains at junctions and turnback points for their designated route.

Fleet, if implemented, shall be provided for the normal traffic direction only.

9.4.2.8.1 Selection of Routes from the Train

Train-to-Wayside Communication route selection shall be provided at all interlockings, and

at the terminal station.

9.4.2.8.2 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.

9.4.2.9 Wayside Signals

9.4.2.9.1 Main Line

LED 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/Red Stop

Flashing Green/Red Block clear. Proceed on normal route. Trains operating with

ATP Bypass activated shall be prepared to STOP at the next

interlocking Signal.

Green/Red Block occupied. Proceed on normal route with Cab Signals.

Trains without cab signals or operating with ATP Bypass

activated shall STOP and contact ROC.

Red/Flashing Green Block clear. Proceed on diverging route. Trains operating with

ATP Bypass activated shall be prepared to STOP at the next

interlocking Signal.

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American Audio VELOCITY - REV 4-05 Operations Instructions Page 52