Ecoroads article,first published,May 25,2026 Road failure is rarely caused by the pavement surface itself. In most cases, deterioration begins deep beneath the roadway, within the base, sub-base, and subgrade layers that support the entire structure. Even the most carefully engineered pavement design will eventually fail if it is built on weak, unstable, moisture-sensitive, or poorly compacted base. Traditional road construction practices often attempt to overcome poor soil conditions by excavating unsuitable materials and replacing them with imported aggregates, crushed stone, cement-treated materials, or another structural fill. These approaches are frequently…
