encyclopedia

SIDE PLATFORM

A passenger platform located to the outside of the tracks or guideways, as distinguished from a center platform located between the tracks or guideways. (TRB)

SIDEBAR

Newspaper or television story that is related or complementary to the primary story often containing more background and descriptive information, using many more quotes or interviews.

SIDING

A railroad passing track constructed to allow trains traveling on the same track in opposite directions to pass without interruption.

SIDING (PASSING TRACK, SIDE TRACK)

A track auxiliary to the main track used for meeting and passing trains.

SIGN-UP (BIDDING RUNS, MARK-UP, OPERATOR PICK, PICK,

The procedure by which, at regular intervals or when new service or realignments of service are implemented, operators select their regular assignment for an upcoming period (typically several months). The order of selection is usually by operator seniority and is…

SIGNAL

Method or device, the aspect of which conveys information affecting movement of trains.

SIGNAL ASPECT

1. The appearance of a fixed signal conveying an indication, as viewed from the direction of an approaching rail unit. 2. The appearance of a cab signal conveying an indication, as viewed by an observer in the cab of a…