discuss these two parts, some of the rules governing makeup and use
of the timetable, and the authorized abbreviations that may appear on
it. First, however, the following subparagraphs explain some of the
important aspects of the application of timetable rules.
a. When timetables take effect. The effective date of a
timetable is listed on it, and at 0001 hours on that date that
timetable supersedes the previous timetable. All trains operating on
schedules not provided for in the new timetable will secure valid
authorization from the dispatcher to continue their runs and go as
b. Schedules. If a train running late will tie up the railroad
or create a safety hazard, a train order is issued to each train
affected by the running of the late train, designating how late it
will be at each station on the line. The rules of train superiority
will be in effect throughout the run of the late train. It will keep
its same class unless a train order is issued annulling its schedule.
When a train is running so late that it affects the entire rail line,
its schedule may be annulled by train order. After a schedule is
annulled, the train can then move to its destination as an extra.
c. Times. The timetable schedule lists all regular trains by
number, class, and direction, gives the leaving time for each at the
original station, and gives the arrival time for each at its final
destination. When a train leaves a station, the schedule for that
train is in effect.
d. Train meeting and passing. On a singletrack division, most
trains meet and pass at designated stations. These stations are
shown on the timetable in fullfaced type (darker and heavier type
than that used elsewhere in the body of the timetable). When one or
more trains are to meet or pass another train at a station, their
numbers are shown in small type beside the meeting or passing time.
e. Timetable changes. Changes to the timetable are made by
issuing a new timetable, by timetable bulletin, or by train order.
When minor or temporary changes to the timetable are necessary, a
timetable bulletin is issued or a train order is given. Generally, a
bulletin makes changes in the special instructions; train orders make
changes in the scheduled movement of trains. If, for example, the
speed limit over a certain section of the division needs to be
reduced for safety from 55 kph to 30 kph, this change to the special
instructions of the timetable is made by a timetable bulletin. On
the other hand, if the schedule of one regular train needs to be