DT 4 stuff Flashcards
Explore essential AWS and TPWS safety protocols and signal irregularities with these informative flashcards. (21 cards)
What does an AWS cancelling indicator look like when it relates to an ESR or TSR?
Yellow background with black cross
What sort of failures is it when an AWS horn should have gone off but no warning is received?
Wrong-side failure
What form must be completed following an AWS irregularity?
RT3185
Two people who must be contacted in connection with an AWS failure and isolation?
- Signaller
- Control
List 5 signal irregularities:
- sunlight on lens
- obscured by vegetation
- no light
- only one light on position light
- white light instead of colour
What TPWS track equipment is not found in dead-end platform lines?
TSS
What will be initiated by TPWS if a driver is approaching a red signal too fast?
Emergency brake application
What’s the biggest risk when dealing with a TPWS activation
Reset and continue
Describe the function of the DRA
- When set it prevents driver taking power
- Reminds driver of aspect
When must the DRA be used?
- stopped at red
- entering or leaving the cab
- stopped at platform and previous signal was yellow and next signal not visible
- stopped at platform and previous signal was a position light
- stopped at platform and previous signal was passed with authority
- approaching platform with a red signal
Which rule book module shows the rules for DRA use?
TW1
What does the below sign indicate?
Speed to the left of the straight route at a diverging junction
What item of track equipment may be associated with the below sign?
AWS magnet
What does a differential speed board for a PSR look like and what trains do the numbers relate to?
Bottom: passenger, parcel/postal, light loco
Top: all other trains
Where will you find details of TSRs?
WONs
What is the equipment sequence for a TSR?
- Portable AWS magnet
- Warning board
- Speed indicator
- Termination indicator
What does SPATE stand for?
Speed Previously Advised Terminated Early
Describe your actions if you noticed missing equipment for an ESR or TSR
Stop train and contact signaller ASAP
Function of the below sign?
Repeating warning board - reminds driver of TSR/ESR
Reasons why a blanket speed restriction might be introduced
- High wind speeds
- high air temp
- weather
- track condition
- damage to OHLE
How are drivers advised of blanket speed restrictions?
- directly by signaller
- late notice case