What is the point on a track beyond which a train on an adjacent track would interfere?

• A. Pocket Tracks
• B. Interlocking
• C. Fouling Point
• D. Restricted Speed

Answer: (C)

The fouling point is the location on a track beyond which a train on an adjacent track would interfere. It defines the boundary where occupancy on one track starts to encroach on the space of the other track, so movement past that point could cause a collision or blockage with a train on the neighboring track. This concept is used to manage safe clearance between parallel tracks and coordinate train movements.

Pocket tracks are sidings used to store trains or allow overtaking; interlocking is the system that ensures signals and switches keep movements in the safest possible sequence; restricted speed is simply a speed limit for a section of track.