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

Existing Deficiencies

In addition to projecting annual investment requirements for future years, TERM also calculates the amount of investment that would be required to correct existing deficiencies in the nation's transit system. This is similar to the highway needs backlog calculated by HERS. TERM does this by immediately replacing assets whose condition is below the specified replacement level (see Appendix I). These corrective expenditures in the first year then become part of the 20-year investment totals. Eliminating the 1997 deficiencies under the Maintain Conditions scenario would cost $15.1 billion, while eliminating deficiencies under the Improve Conditions scenario totals $25.1 billion.