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Section 2: Design Guidelines

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Introduction

The design guidelines presented in this section are intended to aid in planning Highway Safety Improvement Program (HSIP) projects. The design guidelines reference portions of the Roadway Design Manual and establish items of work not eligible for HSIP funding. These guidelines offer sufficient flexibility while retaining safety as the essential element of all HSIP projects.

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Design Guidelines

Freeway Project and Non-Freeway “New Location or Reconstruction” Project. All roadway elements affected by the scope of the approved HSIP safety improvement must comply with the “ New Location and Reconstruction (4R) Design Criteria” found in the Roadway Design Manual (Chapter 3). Enhancements to features outside the scope of the HSIP project are at the district’s option and are to be funded using district funds under a separate Control-Section Job ( CSJ).

Non-Freeway “Rehabilitation or Restoration” Projects. All roadway elements affected by the scope of the approved HSIP safety improvement must comply with the “ Non-Freeway Rehabilitation (3R) Design Criteria” found in the Roadway Design Manual (Chapter 4). Enhancements to features outside the scope of the HSIP project are at the district’s option and are to be funded using district funds under a separate CSJ.

For all projects, existing roadway conditions (lane widths, shoulder widths, etc.) must be retained as a minimum.

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Design Considerations

At the beginning of the HSIP project proposal process, highway designers should obtain crash data to identify the specific safety problems that might be corrected and follow the suggested design process in the Roadway Design Manual ( Chapter 4, Section 3).

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Design Exceptions or Design Waivers

When the HSIP design guidelines cannot be met, the current design exception or design waiver process established in the Roadway Design Manual ( Chapter 1, Section 2) must be followed.

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