LIRR DEFINITIONS & SIGNALS EXAM
100% SOLVED 2025
CLEAR BLOCK - ANSWERProceed; Manual Block Clear
ABSOLUTE CLEAR - ANSWERProceed; track clear to next interlocking signal.
Approach next interlocking signal prepared to stop.
CLEAR - ANSWERProceed
APPROACH-MEDIUM - ANSWERProceed approaching next signal at Medium Speed
MEDIUM-CLEAR - ANSWERProceed; Medium speed within interlocking limits
ABSOLUTE-MEDIUM-CLEAR - ANSWERProceed; Medium speed within interlocking
limits. Track Clear to next interlocking signal. Approach next interlocking signal
prepared to stop.
APPROACH-SLOW - ANSWERProceed approaching next signal at Slow speed. Train
exceeding Medium speed must at once reduce to that speed.
APPROACH - ANSWERProceed approaching next signal prepared to stop. Train
exceeding Medium speed must at once reduce to that speed.
CAUTION - ANSWERTrain exceeding medium speed must at once reduce to that
speed. Where a switch is connected with the signal, approach that switch prepared to
stop. Approach next signal prepared to stop
SLOW-CLEAR - ANSWERProceed; Slow speed within interlocking limits
ABSOLUTE-SLOW-CLEAR - ANSWERProceed; Slow speed within interlocking limits.
Track clear to next interlocking signal. Approach next interlocking signal prepared to
stop.
SLOW-APPROACH - ANSWERProceed approaching next signal prepared to stop.
Slow speed within interlocking limits.
FLASHING SLOW-APPROACH - ANSWERTrain will proceed in accordance with signal
indication within interlocking limits and after clearing the interlocking, proceed under
absolute clear indication to the next interlocking.
RESTRICTING - ANSWERProceed at Restricted speed.
, STOP-AND-PROCEED - ANSWERStop; then proceed at Restricted speed
STOP-SIGNAL - ANSWERStop
BLOCK-LIMIT - ANSWERLimit of the block
APPROACH BLOCK-LIMIT - ANSWERProceed approaching next block-limit signal
prepared to stop. Train exceeding Medium speed must at once reduce to that speed
STOP SIGNAL / TRAIN ORDER - ANSWERStop / Orders
TRAIN ORDER - ANSWEROrders
CAUTION INDICATOR
. - ANSWERFacing point switch(es) open. Trains exceeding Slow - speed must at once
reduce to that speed approaching switch or switches prepared to stop
CLEAR INDICATOR - ANSWERFacing point switch(es) closed.
YARD SWITCH INDICATOR - ANSWERWhite - Switch normal, proceed at Restricted
speed. Yellow - Switch reverse, proceed at Restricted speed. Red - Switch not normal
or reverse, route must be verified. The Conductor or Engineer must examine the switch
points to verify that the points fit the rail properly before movement may be made over
switch at Restricted speed.
MAIN TRACK SWITCH TARGET - ANSWERSwitch lined for diverging route.
MAIN TRACK SWITCH TARGET - ANSWERSwitch lined normal for main track
STOP BOARD - ANSWERStop then be governed by timetable special instructions
END OF BLOCK - ANSWERTrain must operate in accordance with rule 153
YARD LIMIT BOARD - ANSWERMain Track Yard limits
BEGIN ASC - ANSWERAutomatic speed control begins
ASC CUT OUT - ANSWEREntering cut out loop
STANDARD WHISTLE POST - ANSWERApproaching crossings at grade for which rule
14L must be sounded.
ROADWAY WORKERS PORTABLE WHISTLE POST - ANSWERWhen roadway work
is being performed in multiple track portions of the railroad, a white banner below the
100% SOLVED 2025
CLEAR BLOCK - ANSWERProceed; Manual Block Clear
ABSOLUTE CLEAR - ANSWERProceed; track clear to next interlocking signal.
Approach next interlocking signal prepared to stop.
CLEAR - ANSWERProceed
APPROACH-MEDIUM - ANSWERProceed approaching next signal at Medium Speed
MEDIUM-CLEAR - ANSWERProceed; Medium speed within interlocking limits
ABSOLUTE-MEDIUM-CLEAR - ANSWERProceed; Medium speed within interlocking
limits. Track Clear to next interlocking signal. Approach next interlocking signal
prepared to stop.
APPROACH-SLOW - ANSWERProceed approaching next signal at Slow speed. Train
exceeding Medium speed must at once reduce to that speed.
APPROACH - ANSWERProceed approaching next signal prepared to stop. Train
exceeding Medium speed must at once reduce to that speed.
CAUTION - ANSWERTrain exceeding medium speed must at once reduce to that
speed. Where a switch is connected with the signal, approach that switch prepared to
stop. Approach next signal prepared to stop
SLOW-CLEAR - ANSWERProceed; Slow speed within interlocking limits
ABSOLUTE-SLOW-CLEAR - ANSWERProceed; Slow speed within interlocking limits.
Track clear to next interlocking signal. Approach next interlocking signal prepared to
stop.
SLOW-APPROACH - ANSWERProceed approaching next signal prepared to stop.
Slow speed within interlocking limits.
FLASHING SLOW-APPROACH - ANSWERTrain will proceed in accordance with signal
indication within interlocking limits and after clearing the interlocking, proceed under
absolute clear indication to the next interlocking.
RESTRICTING - ANSWERProceed at Restricted speed.
, STOP-AND-PROCEED - ANSWERStop; then proceed at Restricted speed
STOP-SIGNAL - ANSWERStop
BLOCK-LIMIT - ANSWERLimit of the block
APPROACH BLOCK-LIMIT - ANSWERProceed approaching next block-limit signal
prepared to stop. Train exceeding Medium speed must at once reduce to that speed
STOP SIGNAL / TRAIN ORDER - ANSWERStop / Orders
TRAIN ORDER - ANSWEROrders
CAUTION INDICATOR
. - ANSWERFacing point switch(es) open. Trains exceeding Slow - speed must at once
reduce to that speed approaching switch or switches prepared to stop
CLEAR INDICATOR - ANSWERFacing point switch(es) closed.
YARD SWITCH INDICATOR - ANSWERWhite - Switch normal, proceed at Restricted
speed. Yellow - Switch reverse, proceed at Restricted speed. Red - Switch not normal
or reverse, route must be verified. The Conductor or Engineer must examine the switch
points to verify that the points fit the rail properly before movement may be made over
switch at Restricted speed.
MAIN TRACK SWITCH TARGET - ANSWERSwitch lined for diverging route.
MAIN TRACK SWITCH TARGET - ANSWERSwitch lined normal for main track
STOP BOARD - ANSWERStop then be governed by timetable special instructions
END OF BLOCK - ANSWERTrain must operate in accordance with rule 153
YARD LIMIT BOARD - ANSWERMain Track Yard limits
BEGIN ASC - ANSWERAutomatic speed control begins
ASC CUT OUT - ANSWEREntering cut out loop
STANDARD WHISTLE POST - ANSWERApproaching crossings at grade for which rule
14L must be sounded.
ROADWAY WORKERS PORTABLE WHISTLE POST - ANSWERWhen roadway work
is being performed in multiple track portions of the railroad, a white banner below the
