Unconnected linear cracks running longways along the road surface and can appear as one single crack or as a series of parallel cracks. Single cracks are often caused by the drying effects of certain tree roots, such a gum trees, especially in an area with underlying soils such as clays, which dry out. These cracks can also be due to poorly constructed joints in a road’s surface.
How are they / is it fixed?
Sealing individual cracks can be done manually by applying air pressure to clean out the cracks, then filling with hot bitumen.