Which statement best describes permanent vs temporary track speed designations?

Which statement best describes permanent vs temporary track speed designations?

• A. Permanent speeds are designated in special instructions; Temporary speeds are designated by dispatcher message or Form EC-1.
• B. Permanent speeds are designated by dispatcher message; Temporary speeds are in special instructions.
• C. Both are designated only by the schedule.
• D. There is no difference between permanent and temporary track speeds.

Answer: (A)

Permanent speeds are the baseline limits for a track segment and are published in Special Instructions (and in the timetable). They stay in effect until an authorized change is issued. Temporary speeds reflect current conditions, such as track work or other restrictions, and are communicated by the dispatcher to crews via a dispatcher message or Form EC-1. This is why the correct understanding is that permanent speeds are designated by special instructions, while temporary speeds are designated by dispatcher message or Form EC-1. The other options mix up where these speeds come from or ignore the difference between permanent and temporary restrictions.

Permanent speeds are the baseline limits for a track segment and are published in Special Instructions (and in the timetable). They stay in effect until an authorized change is issued. Temporary speeds reflect current conditions, such as track work or other restrictions, and are communicated by the dispatcher to crews via a dispatcher message or Form EC-1. This is why the correct understanding is that permanent speeds are designated by special instructions, while temporary speeds are designated by dispatcher message or Form EC-1. The other options mix up where these speeds come from or ignore the difference between permanent and temporary restrictions.