London Borough of Croydon

Which roads will be salted, and when?

You can view gritting routes by clicking on the area links below.

Approximately 30% of the borough's roads are salted (often known as 'gritting') when snow or ice are predicted or in the case of sudden and unforecast snow.

These roads cover about 240km, and they have been chosen because they are the most important ones to keep traffic moving.

The typical criteria for selecting these roads are:

  • 'A' or 'B' roads
  • Main bus routes
  • Approaches to rail stations
  • Approaches to fire, police or ambulance centres
  • Steep gradients.

During times when temperatures remain below zero for an extended period or when there is heavy snowfall, we give priority to the roads on the primary gritting routes. Of these roads there are four priority routes (about 70km worth) that are treated first, and only once the council is happy that these are clear will the remaining nine routes be covered.

When is the salt put down?

Salt is spread on to road surfaces before the road becomes icy or snow starts to fall. This is known as precautionary salting. Depending on traffic, it takes our gritters about two hours to spread salt on the priority routes. We aim to treat the network before sub zero or snowy weather is forecast to arrive.

Except in the case of sudden changes in the weather, when an immediate response may be called for, salting will normally start at either 5am or 7pm.

If the time of salt spreading coincides with peak rush-hour traffic periods, gritters may become delayed in traffic and can get stuck along with other road users they are there to help.

How much salt is put down?

Salt is spread at 10 grams per square metre for a frost warning. Salt can be spread at up to 40 grams per square metre for a forecast snow warning.

We have fitted electronic tracking devices to all of our salting vehicles as well as technology that allows us to see just how much salt has been put down at any location. If your road is on one of the priority lists and you do not believe it has been treated then please contact us via the email or the number below and we will be able to check on the situation.

How effective is salting the roads

Salt lowers the freezing point of water but is not as effective on top of ice or snow. To be most effective it needs traffic moving over it. Prolonged and heavy downfalls of snow will naturally affect the effectiveness of grit salt. As it dissolves it becomes less effective because it is diluted.

Salt supplies

We have 3,549 tonnes of salt in stock ready for the winter ahead. With careful planning this should see us through to the spring, but if we do experience severe weather across the UK then there will of course be the danger of stocks running low and difficulties with getting new supplies delivered.


If the forecast indicates prolonged bad weather then street cleansing and grounds maintenance staff from parks will be called upon to help with manual snow clearance and salting of the pavements.

This will be done on a preventative basis for priority areas such as town centres and around stations.

Salt bins

The council has 577 salt bins that are all repaired and filled at the start of each winter.

These bins have been placed at locations where drivers or pedestrians may need to put down salt in an emergency. For this reason residents are not to take salt away for use on their private driveways as this could be extremely dangerous for other people if the bins are empty when they are genuinely needed.

If you are aware of an empty salt bin then please email or phone us using the contact details below.

A list of salt bin locations can be downloaded below.

Extreme cold

Motorists are warned to take extreme care when temperatures drop below minus six degrees Celsius as there is a risk that salt will become less effective because the melted snow and ice may refreeze.


Highways maintenance

020 8255 2816
Text "ENV" to 60660
020 8763 1649
Address Line:

Floor 6, Zone C

Bernard Weatherill House

8 Mint Walk,

Croydon CR0 1EA

Transport for London: A22, A23, A232 (Red Route)

0845 305 1234
Text '€œENV'€ to 60660
Address Line:

Enterprise Mouchel

97-99 Beddington Lane





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