These pages will be updated with information regarding arrangements during adverse weather conditions
This map shows the primary gritting routes
 

The main routes are generally treated with salt whenever road temperatures are 1°C or below.      

Salting is normally carried out after the evening peak traffic period or before the morning rush, because frost does not usually affect the road surface until late evening or early morning
This map shows the secondary gritting routes
 
The secondary roads will be treated in prolonged adverse weather conditions, that is where the forecast conditions are unlikely to improve for at least 48 hours and the temperature is not expected to rise above freezing within that period, provided that roads on the precautionary salting network do not require treatment. 
In the event of snowfall, roads will be cleared according to their priority status and need.  Salt starts to become ineffective on ice at road temperatures lower that -10oC

There is a winter safety leaflet here:

   
You can follow the Northants County Council 'Gritter Twitter' here: