Permanent deformations of the pavement (indentations) in the wheelpaths. Most common in intersections, where there is braking and stopping traffic.
Causes
- Heavy trucks
- Slow, stopping & standing traffic
- Poor aggregate
- Temperature susceptible asphalt
- Poor construction
- Moisture damage
- Post- construction compaction by traffic
Solutions - Cures
If the existing pavement is continuing to rut, the unstable portion should be milled off and replaced with:
If the rutting is minor and not progressing, it can be filled with:
Solutions - Prevention
- The use of quality design, quality aggregate and quality liquid asphalt
- Adequate drainage
- Elastomeric polymer modified binders have been found to be especially effective