Q6 -- Bi-directional signaling system vs. uni-directional signaling system.
ALLEGATIONS
台灣高鐵棄新幹線的單向號誌，導入了歐洲的雙向號誌技術，所以包括運轉路線、車站及
場站等內部路線的進出，都大幅增加了信號控制的困難度與複雜性。
法國鐵路早已不使用雙向號誌。
THSR uses the European bi-direction signaling system. It significantly
increases the difficulty and complexity for routing, station and depot control.
SNCF has long ceased to use bi-directional signaling system.
FACTS and CORRECTIONS
1. The drawback of having uni-direction signal (e.g., one track is permanently
dedicated to run north bound traffic, the other track is permanently dedicated
to run south bound traffic.) is that whenever there is an incidence, e.g., on
the southbound track, the whole traffic on the southbound track has to be shut
down.
2. THSRC bi-directional signal design allows much more flexibility in the
operation.
3. With the bi-directional signal design, THSRC trains can continue to operate
in both directions even when there is an incident in northbound or southbound
track. The bi-directional signal design will enable the OCC to direct the train
to by-pass the section of track that is having problems, causing minimal
interruptions to the services.
4. Bi-directional signal design is common among international railway
operators, and is used in French, German, Spanish, and Korean high speed rail
systems. The allegation that the French stopped using the system is incorrect.
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