Potholes form in road pavement primarily

1. Water Infiltration: Water seeps into cracks in the pavement and reaches the underlying soil. When the water freezes, it expands and causes the pavement to rise. When it thaws, the pavement contracts, leading to the formation of voids under the surface.

  1. Traffic Stress: Continuous traffic, especially from heavy vehicles, exerts pressure on the weakened pavement. The repeated stress causes the pavement to break and create potholes.
  2. Temperature Fluctuations: Freeze-thaw cycles are particularly damaging. Water that has infiltrated the pavement freezes and expands, then thaws and contracts. This cycle weakens the pavement structure over time.
  3. Poor Drainage: Inadequate drainage systems prevent water from properly flowing away from the pavement. Standing water can seep into the pavement and contribute to pothole formation.
  4. Aging and Wear: Over time, pavement materials degrade and lose their flexibility and strength, making them more susceptible to cracking and potholes.
  5. Subgrade Failure: If the soil beneath the pavement is unstable or poorly compacted, it can lead to settling and voids that eventually cause the pavement above to collapse and form potholes.
  6. Improper Maintenance: Lack of regular maintenance, such as sealing cracks and fixing small issues promptly, can lead to larger problems like potholes.

Addressing these underlying causes through proper construction, regular maintenance, and timely repairs can help reduce the occurrence of potholes.

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