American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 72)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-67 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

 Occupancy of all track circuits, including overlays

 Wayside signal aspects

 Crossing gate status (all gates down)

 Switch position

 Switch locked

 Traffic direction

 Signal time lock

 All other warning indications necessary to alert personnel of possible problems or

failures (such as Battery/Charger alarms).

 Intrusion and fire alarms and equipment trouble.

9.4.4 Metro Green Line Expansion

9.4.4.1 General Requirements

The signaling system shall provide the following functions:

 Interlocking control of switches and signals

 Safe routing of trains

 Safe separation of trains to prevent collisions and side swipes by physically

separated operation on the main line, protected by vital systems

 Protection of highway crossings against road/rail collisions giving railroad traffic

priority by provision of highway crossing warning and protection systems and

interfaces with highway traffic control equipment

 Automatic Train Operation (ATO) in fully-exclusive Right-of-Way

The signaling system and grade crossings shall comply with the AREMA Manual of

Recommended Practices - Signals and CPUC General Orders 75, and 143.

Automatic route setting shall be the normal operation for passenger operation. Manual

selection of routes shall be provided for abnormal operation of trains, when automatic

routing is not possible or not desirable.

Bi-directional operation at full line speed and headway shall be provided throughout the

main line. All sections under signal control shall be signaled such that, in the event either of

the tracks in the double track sections is taken out of service, safe operations can be

maintained.

The signal system shall provide continuous overspeed protection and speed commands

(cab signal) operation, which shall prevent unsafe operation with respect to other trains,

interlocking conditions, civil speed limits, and grade crossings.

The cab signal system shall impose speed restrictions due to civil/track speed limits. In the

normal direction of traffic the following design requirements shall be followed:

 The speed code reduction shall occur at a point no further than 110% of the Civil

Braking Distance from the point of restriction.

 The cab signal and block design shall enable acceleration to the authorized speed

(within safe braking constraints) to commence within 400 feet of the end of the

speed restriction area.

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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 72