Which statement about restricting speed and interlockings is true?

Which statement about restricting speed and interlockings is true?

• A. Restricting speed has different limits outside vs inside interlockings
• B. Restricting speed applies the same limits everywhere
• C. Restricted speed applies across the system
• D. Slow speed is always faster than restricting speed

Answer: (A)

Restricting speed is not the same everywhere; it changes depending on where you are relative to an interlocking. Inside an interlocking, the trackwork, switches, and signal protections require a lower, clearly defined speed so you can observe signals and stop if needed without risking conflicting movements. Outside interlockings, the same restricting-speed rule doesn’t automatically apply, and the allowed speed can be higher or governed by different limits. This location-dependent setup is why restricting speed has different limits inside and outside interlockings. The other statements fall short because they imply a universal speed limit systemwide or make an illogical claim about speed, which isn’t how interlocking protection and speed restrictions work.

Restricting speed is not the same everywhere; it changes depending on where you are relative to an interlocking. Inside an interlocking, the trackwork, switches, and signal protections require a lower, clearly defined speed so you can observe signals and stop if needed without risking conflicting movements. Outside interlockings, the same restricting-speed rule doesn’t automatically apply, and the allowed speed can be higher or governed by different limits. This location-dependent setup is why restricting speed has different limits inside and outside interlockings.

The other statements fall short because they imply a universal speed limit systemwide or make an illogical claim about speed, which isn’t how interlocking protection and speed restrictions work.