How does the gritting process work?
We use six-millimetre crushed rock salt to melt ice or prevent it from forming on the roads. Usually, this is spread onto the road using a purpose-built machine, mounted on a wagon. The spreaders are designed to give an even distribution of salt across the road and spread the salt at a controlled rate. To prevent ice from forming, we spread salt at 10-15 grammes per square metre. But more is needed to melt ice which has already formed and the rate of spread is increased to 20-40 grammes per square metre to achieve this. The wagons also have fittings which enable a snowplough to be fitted when needed.
