Changes

==Life Cycle Costs==

==Life Cycle Costs==

Below are capital and life cycle cost estimates for the three porous asphalt configurations over 25- and 50-year time periods. The estimates of maintenance and rehabilitation (life cycle) costs represent net present values. Operation and maintenance costs are predicted to represent between 26 to 29% of total life cycle costs over the 25-year evaluation period, and increase to between 37 to 40% of total life cycle costs over the 50-year period, due to costs associated with restriping, some repairing of potholes and flushing of underground pipes (underdrain and overflow) after 25 years of operation. Estimates assume no rehabilitation of the permeable pavement surface is required to maintain acceptable drainage performance over the 50 year timeframe.

Below are capital and life cycle cost estimates for the three porous asphalt configurations over 25- and 50-year time periods. The estimates of maintenance and rehabilitation (life cycle) costs represent net present values. Operation and maintenance costs are predicted to represent between 26 to 29% of total life cycle costs over the 25-year evaluation period, and increase to between 37 to 40% of total life cycle costs over the 50-year period, due to costs associated with restriping, some repairing of potholes and flushing of underground pipes (underdrain and overflow) after 25 years of operation. Estimates assume no rehabilitation of the porous asphalt surface is required to maintain acceptable drainage performance over the 50 year timeframe.

===25-Year life cycle cost break down===

===25-Year life cycle cost break down===