Week 10 - Failures of AWS And TPWS

Question 1

If a signal is displaying a green aspect, what indications will the driver receive from AWS? (RS522 Reg 1.3 and Reg 1.4.2)

Answer 1

A bell and the visual indicator will show black

Question 2

You have been informed that AWS has been isolated on a train. What is the maximum speed the train can travel during poor visibility with a competent person onboard? And without a competent person? (TW5 Reg 4.5)

Answer 2

Both cases 40mph

Question 3

You have been informed that AWS has been isolated on a freight train. What is the maximum speed the train can travel with a competent person onboard? And without a competent person? (TW5 Reg 4.5)

Answer 3

• With a competent person they can go normal permissible speed
• Without a competent person they must not exceed 50mph

Question 4

You have been informed that AWS has been isolated on a passenger train. What is the maximum speed the train can travel with a competent person onboard? And without a competent person? (TW5 Reg 4.5)

Answer 4

• With a competent person they can go normal permissible speed
• Without a competent person they must not exceed 60mph

Question 5

TPWS is defective. What is the maximum speed a freight train and a passenger train can travel if no competent person is available? (TW5 Reg 24.5)

Answer 5

Freight train - 50mph

Passenger train - 60mph

Question 6

You receive a report of an AWS fault code 4. What must you do when dealing with the first train that is to proceed towards that signal associate with the AWS? (TS11 Reg 17.2)

Answer 6

• Make sure the signal is not showing a green aspect

- Instruct the driver to tell you what AWS indication they receive

Question 7

A driver reports an AWS wrong side failure as fault code 5, what warning or indication did the driver receive (RS522 Reg 3)

Answer 7

Driver received a clear indication (bell) instead of a warning indication (horn)

Question 8

When do you not need to complete an RT3185 form in relation to an AWS fault? (S7 Reg 7.7)

Answer 8

• The fault is clearly a right side failure
• You can explain the failure or irregularity to be a right side failure and you are fully aware of the circumstances of the failure