Scenario Status of train and Other Result
Procedure
Scenario 1 – Train 1& 2: Automatic Train Result –
Both trains are Both The train are running The trains will be stopped at
in Auto Mode towards each other in a safety distance from each
Automatic Mode. other.
Scenario 2 – Train 1: Manual Train Result –
"One train is Non-Communicating The OCC will ask the TA to
operating in Manual Train (Both VOBC stop the train. once the train
Auto mode, failed) and it is protected is stopped, the train Icon will
while the other by the MRR (Manual route appear on ATC SMC (GUI).
is in Manual reservation)
mode, with the The train attendant is able
driver
to reset the VOBCs from
successfully
the driver console
recovering the
VOBC.
Train 2: Automatic train
The driver Automatic train moving
remains alert towards the manual
and is Train/MRR
responding to
OCC
instructions As the train driver begins
following moving the train toward the
normal entry point, the VOBC will start
operating receiving messages from the
procedures. VCC. These messages are
processed by the VOBC. Once
the train crosses the loop
boundary (entry point), the
VCC can localise the train, and
its footprint will become visible
on the SMC GUI, and TOD will
start showing the distance to
the end of the MRR.
Scenario 3 – Same as scenario 2 Result –
"One train is The OCC will ask the TA to
operating in stop the train. Once the train
Auto mode, is stopped, the train Icon will
while the other appear on ATC SMC (GUI).
is in Manual
mode. The The manual train is still in the
driver has Driver’s control, and he/she
successfully can drive the train beyond the
recovered the MRR protection
VOBC. - TOD/DDU will show the
“Distance to End of MRR
However, the =0 m”
driver is not And
adhering to the “Stop Now”
standard
operating - The OCC can see the
procedures." manual train movement
on the SMC GUI and apply
the signalling protection
If the manual train driver is
kept on moving the train
towards an Automatic train,
the VCC will stop the
Automatic train at a safety
distance
But if the manual train is kept
on moving towards the
automatic train and breached
the Safety envelope of each
other.
The VCC will timeout Both the
trains (automatic and Manual)
but still the manual train will
be under driver control, and
the Driver can keep moving
the train towards the other
train and can collide with it.
Scenario 4 Train 1: Manul Train Result –
Non-Communicating TC cannot see the train
"One train is Manual Train (Both movement from the OCC
operating in VOBC failed and not The Train driver cannot
Auto mode, recoverable), see the “Distance to the
while the other The train is under End of MRR” on the KS–
is in Manual the MRR (Manual TOD (Train Operator
mode. The route Reservation) Display) or AT-DDU
driver is unable Protection (Driver Display Unit)
to recover the
VOBC. Train 2: Automatic train
Automatic train If the Train Driver is not
moving towards the following the OCC instruction
manual Train/MRR and keeps on moving towards
the other train, then it will
have the same result as
Scenario 3.
Note- In Manual mode, the train is under the full control of the driver, who
can, if desired, operate the train in a way that could result in a collision
with another train or proceed through an incorrectly set switch.
