Target Dressing /
Pothole Prevention

Potholes form in the carriageway surface as a result of the fracking action of water being forced into the cracks and crevices , at high pressure, by the action of passing traffic. This is particularly evident in areas of the carriageway surface which might be suffering from poor compaction – longitudinal joints, around ironwork, start and end of machine lay operations, change of asphalt loads during machine lay operations, poorly compacted NRSWA reinstatements.

Surface water is forced into the road surface at pressures exceeding 18 bar (260 PSI), the matrix of the surface course is weakened, loosened and/or removed, with the subsequent formation of potholes.

  • Benefits of surface dressing to seal the carriageway surface but only in the specific areas
  • Prevent the fracking action of surface water
  • Minimum disruption to road users
  • An early prevention to green or light amber carriageway

Target Dressing / Pothole Prevention

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The proposal:

By sealing the carriageway surface, filling cracks and securing the asphalt’s matrix, we can prevent the fracking action of surface water on the carriageway and prevent the formation of potholes. This approach is commonly used in traditional surface dressing, asphalt preservation techniques and micro surfacing. However to apply these techniques to the overall carriageway proves disruptive, expensive and in many situations a large demand on resources.

Target dressing uses the benefits of surface dressing to seal the carriageway surface but only in the specific areas which may be suffering from early stage poor compaction, cracks or fretting – saving resources, time and money, and allowing highway engineers to spread their budget.

The HGV in-cab monitor allows the operative to selcet the areas of the carriageway which require treament and the surface dressing is applied to those selecetd areas as the vehicle passes over the area. This allows each site to be treaded as a mobile works operation; efficiently and with minimum disruption to road users.

We apply a 4mm or 6mm high PSV aggregate onto an intermediate polymer modified bitumen emulsion, all in accordance with NHSS13 quality management procedures. Work can be carried out between the months of March to October and should be applied as an early prevention to green or light amber carriageway conditions.

Target dressing may aslo be used to reinstate recently surface dressed carriageways in accordance with the requirements of the NRSWA.

If you would like more information about Target Dressing

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