Sealed Roads

Frequently asked roading questions

Edge Break, Potholes and Corrugation

An edge break is the damage caused to the edge of the road surface when the base and is not supported properly.

This can be a result of a number of factors, such as tyre action on the gravel adjacent to the surfaced edge, water scouring, and wind eddies from passing vehicles removing fines from the gravel shoulder.

Edge breaks reduce the road width and form deep furrows at the edge, both of which are recognised as hazards to traffic.

A pothole is a round shaped hole in the road surfacing normally indicative of inadequate routine maintenance.

This can be a result of poor material quality, a lack of adequate compaction and the presence of water in the base layer due to subsurface seepage or a pervious surfacing.’

Potholes are more common on unsealed roads in the damp weather where the road is flat and a hollow occurs. The traffic splashes the ‘fines’ out and potholes develop.

Potholes constitute a traffic hazard and need to be repaired as soon as practically possible. If left unattended it will normally extend beyond the surface layer into the basecourse.

Care must be taken to ensure the repair adequately addresses the problem.

Corrugations are one of the more annoying aspects of unsealed roads.
They are often formed through bad driving habits, change of gradients or change from a sealed surface to an unsealed one.
Our contractor can grade out some of the corrugations, but grading too deep can also have a negative impact on the substructure of the road, allowing unravelling or allowing water to seep in causing greater problems.

We invite you to contact us if you have any concerns about the state of any sealed or unsealed road.