Pavements are designed for an expected service life or design life. In some parts of the United Kingdom the standard design life is 40 years for new bitumen and concrete pavement. Maintenance is considered in the whole life cost of the road with service at 10, 20 and 30-year milestones. Roads can be and are designed for a variety of lives (8-, 15-, 30-, and 60-year designs). When pavement lasts longer than its intended life, it may have been overbuilt, and the original costs may have been too high. When a pavement fails before its intended design life, the owner may have excessive repair and rehabilitation costs. Some asphalt pavements are designed as perpetual pavements with an expected structural life in excess of 50 years.
Pavements are designed for an expected service life or design life In some parts of the United Kingdom the standard design life is 40 years for new bitumen and concrete pavement Maintenance is considered in the whole life cost of the road with service at 10 20 and 30-year milestones Roads can be and are designed for a variety of lives (8- 15- 30- and 60-year designs) When pavement lasts longer than its intended life it may have been overbuilt and the original costs may have been too high When a pavement fails before its intended design life the owner may have excessive repair and rehabilitation costs Some asphalt pavements are designed as perpetual pavements with an expected structural life in excess of 50 years