Report - London Borough of Hillingdon

5.0 ROUTE PLANNING FOR CARRIAGEWAYS, FOOTWAYS AND CYCLE ROUTES
5.1 Carriageway routes for pre-treatment
The main criteria used in drawing up the predetermined routes were to maintain:
• Links to the national road network, industry, commercial and business centres.
• Maintain public transport and access by emergency services.
• Journeys to and from work.
When the road surface temperatures are expected to fall below 0 o C and Roads are expected to
remain generally dry, “Blackspots” are treated. “Blackspots” are hills, junctions and known
areas where it is known that frost or ice is likely to form locally (see Appendices 1A and 2A for
location lists)
When the road surface temperatures are expected to fall below 0 o C and Icy frost is expected to
form, Priority Routes are treated - routes of primary importance which tend to be “A“ roads
and “B“ roads (see Appendices 1A and 2A for location lists).There are 8 Priority routes made up
of 16 sections.
When the road surface temperatures are expected to fall below 0 o C and Icy patches or
widespread ice is expected to form, or snow is expected: Priority and Secondary routes are
treated. They include all roads which fall under the criterion used to draw up the predetermined
routes and include all bus routes. (see Appendices 1A and 2A for location lists) There are 8
Secondary routes made up of 12 sections
The routes have some flexibility and the Street Environment Manager will inform the WST of
additions that he requires as a result of reports of water main leaks etc., received during the
day.
No footways, pedestrian precincts or cycle ways are specifically included in pre-determined
routes for precautionary salting. Nevertheless, there will be a certain amount of over spill of salt
onto footways and cycle ways when precautionary salting is being carried out on adjacent
carriageways.
The Street Environment Manager will update the routes as necessary due to new constraints
imposed on access through, e.g. traffic calming measures or parking problems. Any
amendments will be provided to the WST as soon as possible.
Reports of wet areas due to the Statutory Utilities operations or plant, or from Contractor's sites
on the public highway will be treated until written confirmation is received that either the problem
has been solved or they have put in place a salting regime themselves. The WST will recharge
the costs involved in treating these on their behalf.
5.2 Carriageway routes for post-treatment
The primary and secondary salting routes identified above as pre-treatment routes may be
ordered for post treatment as conditions dictate.
Reports of Ice on the Public Highway Information from the police or emergency services will be
actioned in line with the priorities as described in this plan. Clarifications should be sought as to
whether it's one specific site or a general area and to the cause of the slipperiness. For example
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