AWS/TPWS/DRA/Speed Flashcards
When an AWS warning indication should have been received but isn’t what is this called?
Wrong side failure
Which form for an AWS irregularity?
RT3185
Two people to contact in connection with an AWS failure and isolation?
Signaller
Fleet
5 different signalling irregularities?
AWS wrong and right side failures Wrong sequence No aspect (not lit) Wrong routed Semaphore vertical or wrong position Foliage obscuring Bleaching by sun White light instead of colour Only one light on position light
TPWS Equipment associated with the approach to stop signals and some permanent speed restrictions
Over speed sensor system (arming and trigger loops)
Biggest risk when dealing with TPWS activation?
Resetting and continuing
What will be initiated by TPWS if driving too fast towards a red signal?
A brake demand and flashing brake demand light on the control panel
DRA function?
A device to remind the driver of the aspect and while set power cannot be taken
When to use DRA? Four answers
Before starting/relieving a driver
When stopping in a platform and starting signal is at danger
When signalled into platform and last signal at caution
When authorised to pass signal at danger
Where to find information about using DRA?
Tw1 Tw5 and PDP
Spate?
Speed previously advised terminated early
If a TSR needs to be in place for a longer period where will this be published?
Late notice case as an emergency speed restriction
If you noticed missing equipment associated with an ESR or TSR what would you do?
Stop and call the Signaller
Where would you find a repeater board for a TSR?
At the end of a platform /connection from sidings/dead end platform where there is 300 metres before the commencement of the TSR
A reason for a blanket speed restriction?
Adverse weather
OLE damage
Track condition
High air temperatures affecting the infrastructure
