PTS PTS - Personal Track Safety Railway Hazards and Terminology 5 — Questions and Answers
Question 1: What is a 'booked line speed' and why is it relevant to track safety?
- The maximum speed trains are permitted to travel on a given section, affecting the warning time workers receive (Correct answer)
- The agreed speed at which engineering trains travel through a possession
- The reduced speed imposed after a track defect is reported
- The speed used to calculate minimum clearance distances for workers
Correct answer: The maximum speed trains are permitted to travel on a given section, affecting the warning time workers receive
Booked line speed is the maximum permitted train speed on a section; faster speeds mean trains arrive more quickly, reducing the warning time available to workers.
Question 2: What is meant by a 'line block' as a method of protection for track workers?
- A physical barrier placed across the rails to stop approaching trains
- An authority from the signaller preventing train movements on a specified line (Correct answer)
- A lockout device applied to a set of points to prevent their movement
- A red flag placed on the rail to warn drivers to stop
Correct answer: An authority from the signaller preventing train movements on a specified line
A line block is a formal instruction from the signaller that prevents train movements on a specified section of line, providing protection for workers.
Question 3: Which railway term describes the vertical distance between the rail head and the underside of a structure above the track?
- Kinematic envelope
- Structure gauge
- Headroom clearance (Correct answer)
- Loading gauge
Correct answer: Headroom clearance
Headroom clearance is the vertical distance from the top of the rail to the underside of a bridge, gantry, or other overhead structure, a critical safety dimension for workers and vehicles.
Question 4: What does the term 'ballast shoulder' refer to, and what hazard can it present?
- The compacted zone beneath the sleepers; workers may sink into it unexpectedly
- The sloped outer edge of the ballast bed; loose stone creates unstable footing (Correct answer)
- The area where two ballast layers of different grades meet; a trip hazard at the joint
- The hardened ballast crust on top of sleepers; slippery when wet
Correct answer: The sloped outer edge of the ballast bed; loose stone creates unstable footing
The ballast shoulder is the sloped outer edge of the ballast formation; the loose, angular stones can shift underfoot, causing trips, slips, and ankle injuries.
Question 5: A 'wrong-line order' (WLO) authorises what action on a railway?
- Train movement in the direction opposite to the normal flow of traffic on that line (Correct answer)
- A maintenance vehicle to travel at a higher speed than the standard possession limit
- Engineers to work on the track without a formal possession in place
- A driver to pass a signal at danger under specific controlled conditions
Correct answer: Train movement in the direction opposite to the normal flow of traffic on that line
A wrong-line order is a formal authority for a train to travel in the opposite direction to normal traffic on a line, requiring all workers to be aware of trains from both directions.
Question 6: What is the significance of a 'whistle board' located beside the track?
- It marks the boundary of a possession or engineering block
- It instructs train drivers to sound their horn at that location as a warning (Correct answer)
- It identifies the location of an undertrack crossing for workers
- It denotes the start of a reduced speed restriction zone
Correct answer: It instructs train drivers to sound their horn at that location as a warning
A whistle board is a lineside sign instructing drivers to sound the train horn, typically near level crossings, footpaths, or other locations where a warning is required.
Question 7: In the context of PTS, what is a 'place of safety'?
- A designated muster point at least 500 metres from the nearest rail
- A position clear of all lines and structures where a worker cannot be struck by a train (Correct answer)
- Any location within the cess that is more than 2 metres from the rail
- The area inside the boundary fence but outside the track formation
Correct answer: A position clear of all lines and structures where a worker cannot be struck by a train
A place of safety is any position where a worker is completely clear of all running lines, structures, and the hazard zone so they cannot be struck by a passing train.
PTS PTS - Personal Track Safety Railway Hazards and Terminology 5
What is a 'booked line speed' and why is it relevant to track safety?