About: LS 90

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LS (stands for “Liniový Systém” in Czech, “continuous system” in English) is a cab signalling and a train protection system used on the main lines of the Czech and Slovak railways (on all lines which track speed exceeds 100 km/h in the Czech republic or 120 km/h in Slovakia). This system continuously transmits and shows a signal aspect of the next main signal in driver's cabin and when the driver's activity is needed (e.g. a speed reduction), it periodically checks the driver's vigilance (he has to press the “vigilance” button; else the emergency brake is applied). This is the main function of on-board part of the LS-system (continuous cab signalling and checking the driver's vigilance when needed).

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  • Liniový vlakový zabezpečovač LS je československý vlakový zabezpečovač umožňující přenos čtyř návěstních znaků na stanoviště strojvedoucího. Jeho funkce je sloučena s funkcí kontroly bdělosti strojvedoucího. (cs)
  • LS ist ein Zugbeeinflussungssystem, das bei den Eisenbahnen in Tschechien (SŽDC) und der Slowakei (ŽSR) verwendet wird. Die Abkürzung LS steht für tschechisch Liniový Systém, was mit kontinuierlicher Übertragung übersetzt werden kann. LS ist in Tschechien auf allen Hauptbahnen mit einer zulässigen Geschwindigkeit über 100 km/h, in der Slowakei auf Hauptbahnen mit einer Geschwindigkeit über 120 km/h installiert. Die meisten tschechischen und slowakischen Triebfahrzeuge sind mit einem Fahrzeuggerät ausgerüstet, das mit LS zusammenarbeitet. (de)
  • LS (stands for “Liniový Systém” in Czech, “continuous system” in English) is a cab signalling and a train protection system used on the main lines of the Czech and Slovak railways (on all lines which track speed exceeds 100 km/h in the Czech republic or 120 km/h in Slovakia). This system continuously transmits and shows a signal aspect of the next main signal in driver's cabin and when the driver's activity is needed (e.g. a speed reduction), it periodically checks the driver's vigilance (he has to press the “vigilance” button; else the emergency brake is applied). This is the main function of on-board part of the LS-system (continuous cab signalling and checking the driver's vigilance when needed). Trackside part of the LS-system is based on coded track circuits using carrier frequency 75 Hz with 100% amplitude modulation (on-off keying). The signal aspect of the next signal is coded in modulation frequency (there are used four modulation frequencies: 0.9 Hz – 1.8 Hz – 3.6 Hz – 5.4 Hz; it means that it is possible to transmit four signal aspects). The LS-system can transmit these signal aspects: * Red aspect – train must stop at the next signal. * Aspect requiring decreasing of train's speed – train must reduce its speed at the next signal to the value shown at the lineside signal. * Yellow aspect – there are no speed restrictions at the next signal, but the subsequent signal is red. * Green aspect – there are no speed restrictions at the next signal. The trackside part of the LS-system became an integral part of every Automatic Block used on the lines in the Czech Republic and in Slovakia. Almost the entire fleet of locomotives is equipped with the on-board part of the LS-system (in one of these versions: LS II–IV, LS 90, LS 06 or MIREL VZ1). (en)
  • LS는 체코 및 슬로바키아에서 사용하는 철도 신호 시스템이다. 선로 허용 속도가 100km/h를 넘는 모든 구간에 설치되어 있다. 기관사 상태와 연동해서 동작한다는 특징이 있다. (ko)
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  • Liniový vlakový zabezpečovač LS je československý vlakový zabezpečovač umožňující přenos čtyř návěstních znaků na stanoviště strojvedoucího. Jeho funkce je sloučena s funkcí kontroly bdělosti strojvedoucího. (cs)
  • LS ist ein Zugbeeinflussungssystem, das bei den Eisenbahnen in Tschechien (SŽDC) und der Slowakei (ŽSR) verwendet wird. Die Abkürzung LS steht für tschechisch Liniový Systém, was mit kontinuierlicher Übertragung übersetzt werden kann. LS ist in Tschechien auf allen Hauptbahnen mit einer zulässigen Geschwindigkeit über 100 km/h, in der Slowakei auf Hauptbahnen mit einer Geschwindigkeit über 120 km/h installiert. Die meisten tschechischen und slowakischen Triebfahrzeuge sind mit einem Fahrzeuggerät ausgerüstet, das mit LS zusammenarbeitet. (de)
  • LS는 체코 및 슬로바키아에서 사용하는 철도 신호 시스템이다. 선로 허용 속도가 100km/h를 넘는 모든 구간에 설치되어 있다. 기관사 상태와 연동해서 동작한다는 특징이 있다. (ko)
  • LS (stands for “Liniový Systém” in Czech, “continuous system” in English) is a cab signalling and a train protection system used on the main lines of the Czech and Slovak railways (on all lines which track speed exceeds 100 km/h in the Czech republic or 120 km/h in Slovakia). This system continuously transmits and shows a signal aspect of the next main signal in driver's cabin and when the driver's activity is needed (e.g. a speed reduction), it periodically checks the driver's vigilance (he has to press the “vigilance” button; else the emergency brake is applied). This is the main function of on-board part of the LS-system (continuous cab signalling and checking the driver's vigilance when needed). (en)
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  • Liniový vlakový zabezpečovač LS (cs)
  • LS (Zugbeeinflussung) (de)
  • LS 90 (en)
  • LS (철도 신호) (ko)
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