American Audio VELOCITY - REV 4-05 Betriebsanleitung PDF herunterladen (Seite 81)

METRO RAIL DESIGN CRITERIA SECTION 9 / SYSTEMS

DE304.09 9-76 Revision 4 : 05/09/12

Metro Baseline Re-Baseline: 04/29/10

 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.

9.4.5 Metro Red Line Expansion and Any New HRT Construction

9.4.5.1 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

 Automatic Train Operation (ATO)

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

Recommended Practices - Signals.

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.

 The maximum block length shall be 2,000 feet.

 All track circuits with a Maximum Authorized speed (MAS) exceeding 40 mph shall

have at least one intermediate speed code before “STOP”.

 Exceptions to the above criteria shall be reviewed on a case-by-case basis.

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American Audio VELOCITY - REV 4-05 Betriebsanleitung Seite 81