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Introduction

Introduction

The National Highway System (NHS) was established by the National Highway System Designation Act of 1995. This system consists of the highways of greatest National interest, including all of the Interstate highways, a large portion of other principal arterial highways, and a small portion of mileage on the other functional systems.

This appendix presents NHS characteristics, conditions, operational performance, finance, and future investment requirement information in a similar format as used to present information on all roads in Chapters 2, 3, 4, 6, 7, 8 and 9. See these chapters for additional background material on the statistics presented in this chapter.

Personal mobility and safety information comparable to that included in Chapters 1 and 5 is not available for the NHS specifically. The type of sensitivity analysis described in Chapter 10 was not performed on the NHS investment requirements separately.

The Federal Highway Administration is currently working on a separate study of the conditions and investment requirements of NHS Freight Connectors. Some preliminary information on the conditions of these vital links is included in Appendix C.