You said you gritted the road, but it's still slippery?
Gritting does not always guarantee an ice-free road surface and salt is less effective the colder it gets.
Rain and surface water run-off can also reduce the effectiveness of our gritting by washing the salt away.
Traffic needs to drive over a gritted road in order to grind the salt and activate it. Salt alone does not melt snow and ice.
There's a layer of snow on the road. Why didn't you grit?
When we grit a road, further snow fall can lay on top of the road surface. This covers the salt and makes it look like we haven't gritted.
Traffic needs to drive over a gritted road in order to grind the salt and activate it. Salt alone does not melt snow and ice.
It's below freezing. Why didn't you grit?
Sometimes, even if the air temperature is below freezing, roads can keep a small amount of heat, meaning that ice won't form on them.
Sometimes there isn't enough moisture in the air to form ice, even if it's below freezing.
Weather forecasts report air temperature; we use a combination of air and road surface temperature to decide when and where we grit.
It's above freezing. Why did you grit?
If air temperature rises, it can take a little time for road surface temperatures to rise too. Road surface temperatures can remain a few degrees below air temperature, and as a result, moisture on the road can freeze. So we may still grit even if air temperature is above freezing.
I was driving behind a gritter and it wasn't spreading any salt
The council's road network is one of the largest in the country, after Highways England.
Gritters don't always spread salt the moment they leave the depot; they may be travelling to another location to spread salt.
It may also be the case that the gritter has used up its salt, and is returning to the depot to refill. In both of these cases, the gritter will appear to be travelling without spreading any salt.
I travel to work early in the morning, and the priority road I use wasn't gritted
The county council's road network is one of the largest in the country, after Highways England.
It can take time for our gritters to reach their destination and begin gritting. Our gritters usually begin their work from 5am.
Priority one roads are usually completed between 5am and 7am, which means it takes around two hours for our gritters to travel these routes.
Priority two roads are usually completed between 7.30am and 10am, once priority one roads are complete, which means it takes around two and a half hours for our gritters to travel these routes.