Report - London Borough of Hillingdon

WINTER SERVICE OPERATIONAL PLAN
APPENDIX 3
All messages will commence with a Condition Indicator - or perhaps two Condition Indicators
if required - and this will be followed by amplifying information on timing, (e.g. AFTER 2100)
and, if appropriate, height (e.g. ABOVE 300 FT).
26BDecision Making Procedure
Condition
Indicator/s
Nil
Alpha
Precipitation, etc
No rain, No hoar
frost, No fog
No rain, No hoar
frost, No fog
Predicted Road Condition
Wet/Wet
Pre-salted in last 24
Dry
Patches
hrs - no rain since.
May fall below freezing.
Route coverage
6 6 6 0
Expected to fall below freezing – See Note (E).
1 (note A) 6 (note A) 6 (note A) Black spots only
Alpha Locally Bravo
Bravo
Expected hoar frost
Expected fog 1 1 (note B) 4 (note B) Priorities
Bravo Locally
Charlie
Charlie
Delta
Expected rain
before freezing
Expected rain
during freezing
3 (note C) 3 (note C) 3 (note C) Priorities & Secondaries
2 (note D)
2 or 5
(note D)
2 or 5 (note D) Priorities & Secondaries
Snow Snow 1 1 1 Priorities & Secondaries
The decision to undertake precautionary treatments should if appropriate be adjusted to take
account of residual surface moisture. All decisions require continuous monitoring & review.
27BACTION
1 Salt before frost/Snow. 4 Inspection required.
2 Salt before frost, as
required during rain &
again after rain stops.
5 Inspection required with crews ‘standing by’ in depot for instructions.
3 Salt after rain stops. 6 No action likely, monitor weather
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