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The smoothness of Asphalt road depends on the design criteria.
Perpetual Pavement Design is most likely used for long lasting and smoothness of asphalt road.Perpetual Pavements
Perpetual Pavements use multiple layers of asphalt surfaces. The pavement design begins with a strong yet flexible asphalt base layer that resists the repeated bending of tensile strains caused by traffic, and thus stops cracks from forming in the bottom of the pavement.
A strong intermediate asphalt layer (binder course) completes the permanent structural portion, and the final layer (wearing course) is a rut-resistant asphalt surface that lasts many years before needing restoration.
When the wearing course starts to show distress or when it loses its skid resistance, the top layer is milled off, recycled and replaced with a new wearing course.
Perpetual pavements can be maintained easily and cost-effectively without removing the road structure for reconstruction, saving time and money.
A perpetual pavement provides a sustainable, durable, safe, smooth, long-lasting roadway without expensive, time-consuming, traffic-disrupting reconstruction or major repair.
A good Vibration and compactation of the concrete.
