Train Control

Question 1

ALERTER

Answer 1

a device, which detects the frequency of the engineer’s movements and initiates a penalty brake application when the required frequency of such movement is not maintained or acknowledged.

Question 2

ASPECT DISPLAY UNIT (ADU)

Answer 2

the device in the controlling cab on which cab signal aspects are shown.

Question 3

AUTOMATIC TRAIN CONTROL (ATC)

Answer 3

a system that initiates a penalty brake application if the engineer fails to reduce speed in compliance with cab signal indications.

Question 4

AUTOMATIC TRAIN STOP (ATS)

Answer 4

a system that initiates a penalty brake application if the engineer fails to acknowledge a more restrictive cab signal indication.

Question 5

CENTRALIZED TRAFFIC CONTROL (CTC)

Answer 5

a method of operation, on tracks designated in the Timetable, where movements are authorized and governed by interlocking signals, cab signals, instructions issued by the RTC, or a combination of the above.

Question 6

CONTROL CONSOLE

Answer 6

the apparatus by which the RTC controls switches, signals, and direction of traffic in CTC territory, and which displays track status and occupancy.

Question 7

LOCOMOTIVE SPEED LIMITER (LSL)

Answer 7

a type of ATC system, found primarily on freight locomotives, that initiates a penalty brake application if the engineer fails to reduce speed in accordance with a defined braking profile.

Question 8

OPERATIONS CONTROL CENTER (OCC)

Answer 8

the location from which RTCs control movements and perform their other duties.

Question 9

TRAIN CONTROL APPARATUS

Answer 9

the equipment on an engine or cab car that receives and displays cab signals and controls the speed of the train in accordance with that signal. Train control apparatus includes the cab signal unit, the aspect display unit, the automatic train control, the automatic train stop, and all associated equipment.