Speeds, ESRs & TSRs Flashcards
(41 cards)
Where are permissible speeds found?
Sectional Appendix
When can you accelerate to a higher speed when coming from a lower speed section?
When the whole train has left the previous section. Train must be doing any lower speed at the speed board.
Which of Hull’s fleet are HST?
158 & 170
Which of Hull’s fleet are DMUs?
150, 155, 158, 170
Which of Hull’s fleet are SP?
150, 155, 158 & 170
What is the purpose of a permissible speed indicator?
Shows start of new speed. Round with red edge and speed in centre.
Oval in limited clearance and can have arrows if applying to a junction.
What is the purpose of an acceleration indicator and where might these be seen?
In association with a permissible speed indicator. These show the point at which you can accelerate to the speed shown when the train passes the sign (full train doesn’t need to have left the previous section).
What is the purpose of a differential permissible speed indicator?
Top figure= all other trains
Bottom figure= Passenger, postal, parcel and light locomotives (loaded/unloaded)
What is the purpose of a permissible speed indicator with letters?
To show where a permissible speed only applies to trains shown by the letters.
What are your actions if letters are shown on a permissible speed indicator and your train falls into that category but isn’t capable of reaching that speed?
Travel at the maximum speed of your train.
What is the purpose of warning indicators?
Warns of drops in speed when the initial speed is 60mph or more and there is at least 1/3 reduction in speed.
Where are warning indicators placed in relation to the new speed that they are warning about?
Service braking distance away
What is located before a warning indicator?
AWS magnet 180m before the warning indicator.
What is sometimes located after a warning indicator and before the new speed commences?
TPWS overspeed loops.
What are your actions when travelling over a TSR?
Control speed of train to that on warning board and maintain this speed until the full train passes the termination board. You may then accelerate to the normal permissible speed.
What signage is used in TSRs?
Warning boards (2x dots) before the TSR to warn of the upcoming speed
Speed indicator to signify the start of the restriction and the permitted speed
Termination indicator to signify the end of the restriction. You must not accelerate until the full train is past this board.
Acceleration Indicator to signify the end of the restriction and allow acceleration to permissible speed when the front of the train passes the sign.
SPATE indicator- speed previously advised terminated early. This shows that the TSR has been withdrawn or will not be imposed.
Temporary AWS cancelling indicator to show where an AWS warning applies to trains travelling in the opposite direction only.
How far are warning boards and commencement boards apart?
Service braking distance
Which signs have AWS warnings before them?
Warning boards- AWS magnet 180m before the warning board
Draw and explain normal TSR arrangements
Portable AWS 180m from warning board
Warning board SBD from speed indicator
Termination indicator at end of TSR
Draw and explain TSR arrangements where there is a fixed AWS magnet
If magnet already associated with something else, warning board is at signal and electromagnet disconnected so you will always receive horn.
Warning board never placed between fixed magnet and related equipment
Portable magnet used if warning board not at the signal.
Draw and explain TSR arrangements on a single and bi-directional line?
Normal TSR arrangements but in both directions with addition of Temporary AWS cancelling indicator 180m beyond AWS magnet (confirms warning doesn’t apply to you but trains in wrong direction).
Draw and explain TSR arrangements for consecutive TSRs where there is a lower speed beyond a higher speed
Warning board for higher speed
Commencement for higher speed
No termination indicator for higher speed
Warning board for lower speed (more restrictive)
Speed indicator for lower speed
Single termination indicator at end of lower speed
Draw and explain TSR arrangements for consecutive TSRs where there is insufficient distance for normal arrangements for a lower speed beyond a higher speed?
Warning board for higher speed with AWS before it, warning board for lower speed at least 45m beyond first warning board (2nd portable magnet immediately beyond 1st warning board).
Speed indicator for higher speed
Speed indicator for lower speed
Single termination indicator
Draw and explain the arrangements for consecutive TSRs where there is a higher speed beyond a lower speed?
Warning board for lower speed
Speed indicator for lower speed
No warning board for higher speed as less restrictive, just speed indicator
Single termination indicator