TRANSPORTATION SYSTEMS AND
OPERATIONS CONCEPTS AND SOLVED
ITEMS
◉ INTERLOCKING SIGNALS
Answer: the fixed signals of an interlocking.
◉ MAXIMUM AUTHORIZED SPEED (MAS)
Answer: the maximum speed authorized by the Operating Rules and
Special Instructions.
◉ LIMITED SPEED
Answer: not exceeding 45 MPH for passenger trains, and not
exceeding 25 MPH for other trains.
◉ MEDIUM SPEED
Answer: not exceeding 30 MPH for passenger trains, and not
exceeding 15 MPH for other trains.
◉ SLOW SPEED
, Answer: not exceeding 15 MPH
◉ BLOCK LIMIT
Answer: a place where a block limit signal is displayed.
◉ CONTROLLED POINT (CP)
Answer: a station where signals are remotely controlled from the
Operations Control Center (OCC).
◉ PASSENGER STATION
Answer: a place designated in the station pages of the Special
Instructions where passengers are received and/or discharged.
◉ STATION
Answer: a place designated in the station pages of the Special
Instructions by name.
◉ CLEARANCE POINT
Answer: the location near a turnout beyond which it is unsafe for
passage on an adjacent track.
◉ DERAIL