1. ABSOLUTE BLOCK A block that may be occupied by only one train
at a time.
2. REROUTING Diverting a train from its normal route be-
cause of blockage or unusual occurrence
3. REVENUE TRAIN A train that carries passengers
4. TIMETABLE Shows the time the train is due to arrive
and leave from each listed terminal, arriving
and/or departing times at intermediate sta-
tions , running times, headways, and train
routes
5. GAP STATIONS Key locations between the terminals of a line
where trains are recorded as they pas by,
can be properly spaced and can be held for
connections
6. RELAY TRACK A track outside the station limits on which a
train is placed when being relayed or "swung"
from one station to another station
7. SIGNAL YELLOW OVER Proceed on the main route, be prepared to
GREEN stop at the next signal
8. SUBDIVISION "A" SIG- Approach at allowable speed, then continue
NAL DISPLAYING YELLOW on the main route
OVER RED WITH AN ILLU-
MINATED "S"
9. DWARF SIGNAL A signal with a fixed STOP indication display-
ing red over red
10. AUTOMATIC SIGNAL A signal that is controlled by the movement of
trains
11. INTERLOCKING SIGNAL A signal at a fixed location indicating a condi-
tion controlling the movement of trains
, MTA TOWER OPERATOR STUDY GUIDE WITH ANSWERS GRADED A+
12. TOWER OPERATORS (a) Required to familiarize themselves with
the rules and regulations
(b) train schedules
(c) maintain records of all train movements
13. OBSTRUCTION ON TRACK, Notify RCC and display a red signal
A TOWER OPERATOR WILL
14. WITHOUT PROPER AU- Remove authorized appliances from ma-
THORITY, A TOWER OPERA- chines
TOR MUST NOT
15. TOWER OPERATORS MUST (a) unusual conditions
NOTIFY RCC WHEN (b) unusual intervals bet trains
(c) operating part time tower
16. EXPEDITING SERVICE, Crank switches, and flag trains
TOWER OPERATOR MUST
17. TOWER OPERATORS MUST station platforms and model boards
OBSERVE
18. RULE 9.05 (n) "When for any reason it is necessary to divert
a train from its regular route, the switch must
not be set for the diverging move."
19. TOWER OPERATORS MAY Dispatchers and assistant dispatchers, super-
TAKE INSTRUCTION FROM intendents RTO
20. WHEN OPERATING AN Cooperate with Maintainers
INTERLOCKING MACHINE,
TOWER OPERATORS MUST
21. FROG Two running rails that intersect
22. TYPE VIII track Concrete and rubber padding
23. TYPE III track Used for elevated structures
24. RELAY