Union Pacific -- Railroading Basics (GCOR)
Questions and Correct Detailed Answers
(Verified Answers) 2026/27 | Graded A+
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Terms in this set (90)
Main Track A track extending through yards and between
stations that must not be occupied without
authority or protection.
Station A place designated by name in the timetable
station column.
Single Track A main track where trains are operated in both
directions.
, Train One or more engines coupled, with or without
cars, displaying a marker, and authorized to
operate on a main track. A term that when used in
connection with speed restrictions, flag
protection, and the observance of all signals and
signal rules also applies to engines.
Yard Limits A portion of main track designated by yard limit
signs and timetable special instructions or a track
bulletin. You can have Yard Limits without a yard.
(Rule 6.13)
Yard A system of tracks, other than main tracks and
sidings, used for making up trains, storing cars,
and other purposes.
Siding A track connected to the main track and used for
meeting or passing trains. Location of sidings are
shown in the timetable.
Spur Track A track connected to another track at only one
end.
Track Bulletin A notice of conditions affecting train movement. -
It may also authorize movement against the
current of traffic where Rule 9.14
(Movement with the Current of Traffic) is in effect.
Track Warrant Control (TWC) *A WRRITEN Authority* A method to authorize
train movements or protect men or machines on
a main track within specified limits in a territory
designated by the timetable.
Questions and Correct Detailed Answers
(Verified Answers) 2026/27 | Graded A+
Save
Terms in this set (90)
Main Track A track extending through yards and between
stations that must not be occupied without
authority or protection.
Station A place designated by name in the timetable
station column.
Single Track A main track where trains are operated in both
directions.
, Train One or more engines coupled, with or without
cars, displaying a marker, and authorized to
operate on a main track. A term that when used in
connection with speed restrictions, flag
protection, and the observance of all signals and
signal rules also applies to engines.
Yard Limits A portion of main track designated by yard limit
signs and timetable special instructions or a track
bulletin. You can have Yard Limits without a yard.
(Rule 6.13)
Yard A system of tracks, other than main tracks and
sidings, used for making up trains, storing cars,
and other purposes.
Siding A track connected to the main track and used for
meeting or passing trains. Location of sidings are
shown in the timetable.
Spur Track A track connected to another track at only one
end.
Track Bulletin A notice of conditions affecting train movement. -
It may also authorize movement against the
current of traffic where Rule 9.14
(Movement with the Current of Traffic) is in effect.
Track Warrant Control (TWC) *A WRRITEN Authority* A method to authorize
train movements or protect men or machines on
a main track within specified limits in a territory
designated by the timetable.
