Permeable Pavement

Following urban development which frequently decreases permeable areas, temperature rising and heat island effect occurs in a city. In the past, permeable pavement research was mainly performed in pedestrian sidewalks or low traffic volume areas. Permeable pavement monitoring is required to understand the performance, including permeability, stability, and durability, of road pavements. The permeable pavement test sections located at Ker-Da Road include three different cross section structures to monitor the temperature, soil moisture, earth pressure, and tri-axial strains in different depth in the trial pavements. The studies of permeable pavements can be used in road construction to increase permeable area, subside the heat island effect, and lower the possibility of traffic accidents caused by surface perching water. After 16 months systematical evaluating the permeability of the tested pavement, it was found permeability of the pavements reduced by about 20% due to blockage caused by dust. However, the permeability was restored up to 98% of the original value after a cleaning process.

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