Which device is designed to cause rolling equipment to leave the rails to avoid fouling other tracks?

Which device is designed to cause rolling equipment to leave the rails to avoid fouling other tracks?

• A. Employee
• B. Dwell Time
• C. Derail
• D. Emergency

Answer: (C)

A derail is a safety device that intentionally deflects rolling equipment off the rails to prevent fouling adjacent tracks. It works by presenting a raised rail surface or a movable mechanism that catches a wheel flange and pushes the wheel or truck off the running surface, guiding the car away from nearby tracks. This helps keep trains from blocking or colliding with other tracks, especially near crossings, switches, or yard areas where movements occur. The other terms don’t fit this purpose: an employee is a person, not a device; dwell time is how long a train sits at a location; emergency refers to urgent actions or equipment, not a mechanism to redirect cars.

A derail is a safety device that intentionally deflects rolling equipment off the rails to prevent fouling adjacent tracks. It works by presenting a raised rail surface or a movable mechanism that catches a wheel flange and pushes the wheel or truck off the running surface, guiding the car away from nearby tracks. This helps keep trains from blocking or colliding with other tracks, especially near crossings, switches, or yard areas where movements occur. The other terms don’t fit this purpose: an employee is a person, not a device; dwell time is how long a train sits at a location; emergency refers to urgent actions or equipment, not a mechanism to redirect cars.