UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close
Already an Engineering360 user? Log in.

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

NR - NB 204/APP1 ISSUE 2

Signaller's Control Devices for Automatic Signals: NR/L2/SIG/30009/D310 (Issue 3), Control of Signals (and Supporting Standards)

active, Most Current
Organization: NR
Publication Date: 27 July 2021
Status: active
Page Count: 5
scope:

See NB204/Index. This appendix should be applied when:

• new signals are to be provided;

• existing signals are to be re-controlled;

• existing control systems are to be renewed or re-platformed.

NOTE: Alterations to existing installations should follow this appendixwhere reasonably practicable, unless doing so

would create a significant risk of signaller error, in which case the existing practice in that location should be retained.

Reason for issue

When stopping and cautioning trains at an automatic signal with a signal replacement facility, the

signaller could omit to re-operate the signal replacement control (and apply a reminder again) after a

train has been cautioned. This could result in the signal clearing for a following train before the

signaller has cautioned its driver. With larger control areas the likelihood of this occurring increases.

This notice board is being issued in advance of a planned change to standards to require any

automatic signal which can be controlled to red by a signaller to require specific action on each

occasion that it is required to show a proceed aspect, unless the signaller has set the signal to work

automatically. These signals will be known as Controlled (Intermediate) Signals and will be provided

in lieu of automatic signals with a signal replacement facility from the signal box.

Document History

NB 204/APP1 ISSUE 2
July 27, 2021
Signaller's Control Devices for Automatic Signals: NR/L2/SIG/30009/D310 (Issue 3), Control of Signals (and Supporting Standards)
See NB204/Index. This appendix should be applied when: • new signals are to be provided; • existing signals are to be re-controlled; • existing control systems are to be renewed or re-platformed....
July 23, 2021
Signaller’s Control Devices for Automatic Signals: NR/L2/SIG/30009/D310 (Issue 3), Control of Signals (and Supporting Standards)
See NB204/Index. This appendix should be applied when: • new signals are to be provided; • existing signals are to be re-controlled; • existing control systems are to be renewed or re-platformed....

References

Advertisement