Common issues
- Corrugations are normally created on steep road segments from uphill traffic.
- Corrugations get worse if they are not fixed.
- A short-term fix is to grade to the depth of the corrugation, re-shape, spread metal, water and roll to compact.
- A long-term solution is to use a clay binder, lime stabiliser or tar sealing.
- Check water control during and after harvest.
- Loggers often damage water controls.
- Wet weather, the steep grade and poor road shape has led to surface rutting.
- Fix by cutting, grading and compaction.
- Fix in good weather and when material is not too wet or dry.
- Use a good metal aggregate.
- Heavy traffic can cause severely rutted roads.
- This road is failing. Water has gone through the metal, and weakened the formation. Mud is where metal should be.
- For fixing deep ruts refer to the ‘Fixing weak formation’ section.