Status of the Nation's Highways, Bridges, and Transit:
2002 Conditions and Performance Report
Part I: Description of Current System
Part II: Investment Performance Analyses
Part III: Bridges
Part IV: Special Topics
Part V: Supplemental Analyses of System Components
The average annual Cost to Improve Highways and Bridges
for the 20-year period 2001-2020 is projected to be $106.9 billion. This
represents the investment by all levels of government required to implement
all cost-beneficial improvements on highways and bridges. This level
of investment would address the existing backlog of highway ($271.7 billion)
and bridge ($54.7 billion) deficiencies, as well as new deficiencies as
they arise during the 20-year period, when it is cost-beneficial to do
The Cost to Maintain Highways and Bridges represents the investment required by all levels of government so that critical indicators of overall conditions and performance in the year 2020 will match their year 2000 values. For bridge preservation, it represents the level of investment required to maintain the existing backlog of bridge deficiencies at its current level. For system expansion, and pavement preservation, it represents the investment required to prevent average highway user costs (including travel time costs, vehicle operating costs, and crash costs) from rising in the future. Agency costs, such as maintenance, and societal costs, such as emissions, are also considered in the analysis, although they are not directly targeted. The average annual investment required for the Cost to Maintain Highways and Bridges is projected to be $75.9 billion.
The scope of user costs has been expanded from those considered in previous reports to include an estimate for delays resulting from incidents, as well as for recurring daily congestion. A reliability premium has also been added to reflect the additional costs that unpredictable delays impose beyond those of expected delays for which drivers can plan. Including these items in the analysis makes it considerably more expensive to maintain average user costs.
Estimated transit capital investment requirements have increased
substantially since the 1999 Report. These requirements are estimated
for the period 2001-2020 for four scenarios. The Maintain Conditions scenario
projects the level of transit capital investment necessary to maintain
average asset conditions over this 20-year period, and the Improve Conditions
scenario projects the investment necessary to raise the average condition
of each major asset type to at least a level of "good." The Maintain Performance
scenario assumes investment in new capacity to maintain current vehicle
occupancy levels as transit passenger travel increases and the Improve
Performance scenario assumes that additional investment will be undertaken
to increase average vehicle speeds and reducing average vehicle occupancy
Average annual investment requirements are estimated to be $14.8 billion to Maintain Conditions and Performance ($10.8 billion in 1997) and $20.6 billion to Improve Conditions and Performance ($16.0 billion in 1997). Under the Maintain scenario, $9.2 billion annually would be needed for asset rehabilitation and replacement and $5.6 billion for asset expansion. Under the Improve scenario, $10.3 billion would be needed annually for replacement and rehabilitation, $5.7 billion for asset expansion, and $4.6 billion for performance improvements.
Vehicles, i.e., rolling stock, account for the largest percentage of investment requirements, followed by guideway elements-tracks, tunnels and bridges.