Railway Hazards and Terminology Flashcards

In railway terminology, what does the term 'four-foot' refer to?

Answer: The area between the two running rails of a single track.

The 'four-foot' is the common industry term for the space between the two rails of a track. The name is derived from the standard track gauge, which is approximately 4 feet 8.5 inches.

What is the fundamental difference between working in a 'Red Zone' and a 'Green Zone'?

Answer: In a Red Zone the line is open to traffic and requires a safe system of work, whereas in a Green Zone the line is blocked to all train movements.

A 'Green Zone' is a work area where the line has been formally blocked, meaning no trains can enter the section. A 'Red Zone' is where work takes place while the line remains open to traffic, necessitating a robust safe system of work (such as a Lookout) to protect staff from moving trains.

A Lookout, appointed as part of a safe system of work, sounds an urgent warning of an approaching train. What is the immediate and required action for all staff on or near the line?

Answer: Immediately stop work, acknowledge the warning, and move to the designated position of safety.

The Lookout's warning is an absolute instruction that requires an immediate response. All work must cease instantly, the warning must be acknowledged (usually by raising an arm), and all personnel must move to the pre-agreed position of safety without any delay.

Which of the following best defines a 'position of safety' according to PTS rules?

Answer: A location at least 1.25 metres from the nearest running rail for lines up to 100mph, or 2 metres for lines over 100mph.

The official PTS definition of a position of safety is based on a minimum distance from the nearest running rail. For lines with speeds up to 100 mph, this is 1.25 metres. For lines with speeds over 100 mph, the distance increases to 2 metres to provide a greater margin of safety.

You are working near a track equipped with Overhead Line Equipment (OLE). What is the most critical and immediate hazard presented by OLE?

Answer: The risk of electrocution from the high-voltage lines.

Overhead Line Equipment (OLE) in the UK typically carries 25,000 volts of alternating current (25kV AC). Contact, or even coming too close with tools or equipment, can cause a fatal electric shock as the current can arc. This is the most severe and immediate life-threatening hazard associated with OLE.

What is the primary purpose of the 'cess' alongside a railway line?

Answer: To provide a safe walking route for staff and to assist with drainage.

The cess is the area to the side of the track, beyond the ballast shoulder. Its main functions are to provide a safe place for track workers to walk and stand clear of passing trains, and to act as a channel for water drainage away from the trackbed.