Rule 409 - answer Where speed-controlled trains are operated with fixed automatic
block or interlocking signals (except as affected by rule 410)
Rule 410 - answer Where speed-controlled trains are operated without fixed automatic
block signals.
Rule 251 - answer On portions of the railroad and on tracks specified in the timetable,
trains will run with reference to other trains in the same direction by block signals whose
indications will supersede the superiority of trains.
Rule 261 - answer On portions of the railroad and on tracks specified in the timetable,
trains will be governed by block signals whose indications will supersede the superiority
of trains for both opposing and following movements on the same track.
trains MUST NOT clear the main track at a switch not equipped with an electric lock.
Rule 262 - answer A train for which the direction of traffic has been established must not
move in the opposite direction without proper interlocking signal indication or train order.
Rule 153 - answerAll movements of tracks used for passenger trains, not protected by a
block signal system or by an interlocking, must be made at restricted speed.
Movements on tracks other than main tracks, unless otherwise specified, must be mad
at restricted speed.
Rule 316 - answer(For absolute block for both following and opposing movents on the
same track.)
A train must not be admitted to a block unless it is clear, except as provided by Rule
327 or train order.
Rule 73 - answerExtra trains are inferior to regular trains.
Rule 402 - answerWhen the cab signal indicator displays 15, a train must proceed at
restricted speed until a more favorable cab signal indication is received. Except,
however, when 15 is displayed in conjunction with interlocking signal displaying an
aspect of slow-clear or slow-approach, the train will proceed at slow speed.
Rule 502 - answerA train must not enter a block at a hand-operated switch, or crossover
or foul the main track, without permision from the train dispatcher through the block
operator. trains receiving permision will operate at restricted speed to the next signal
even though the indication of that signal can be observed before it is reached.
Where automatic speed control is in effect trains will be governed by rule 407.
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