U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Status
of the Nation's Highways, Bridges, and Transit:
2002 Conditions and Performance Report |
Exhibit C-1 is a
chart that shows asset decay curves. The vertical axis measures asset condition
from 0 to 6 and the horizontal axis measures progressive age, though without
numbers. There are three lines, all starting at condition 5. The first line,
for linear, goes in a straight line to 1 as an asset ages. The second line,
for logistic, stays between 4 and 5 for a while before sloping sharply to 1
as an asset ages. And the third line, for logit, drops sharply to 3 early on
then slopes gradually to 2 as the asset ages.
Back
to Appendix C