Conditions and Performance Chapter Listing

Conditions and Performance Home Page

Introduction

Summary

Economics-Based Approach to Transportation Investments

Highway Investment Requirements

Bridge Investment Requirements

Combined Highway and Bridge Investment Requirements

Transit Investment Requirements

Comparison with Previous Reports

Exhibit 7-9 contains a comparison of the bridge investment requirements for this report and the previous three reports. The values reported have grown over time for both scenarios, but this is largely due to inflation. In constant dollar terms, the investment required for Maintain Backlog scenario (Cost to Maintain in the 1993, 1995, and 1997 reports) has declined over this time. This is because the number of deficient bridges has declined. The investment required for the Eliminate Deficiencies scenario (Cost to Improve in the 1993, 1995, and 1997 reports) has fluctuated, but remained between $10 and $11 billion annually in constant dollars.

Exhibit 7-9. Comparison of Bridge Investment Requirements 1993, 1995, 1997 and 1999 C&P Reports