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FHWA Home / Safety / Safety EdgeSM Design and Construction Guide

Safety EdgeSM Design and Construction Guide

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Logo: Every Day Counts - Innovation - Ingenuity - Imagination - Invention

Federal Highway Admistration Program
Every Day Counts
Innovation Initiative


Final Report
January 5, 2012

Treskelion Logo
U.S. Department of Transportation
Federal Highway Administration

FOREWORD

The main focus of this document is to explain the important design, construction, and materials-related considerations for constructing the Safety EdgeSM. The target audience of this report is pavement design and construction personnel who will specify and construct the Safety EdgeSM.

1. Report No. 2. Government Accession No 3. Recipient's Catalog No
3. Title and Subtitle
Safety EdgeSM Design and Construction Guide
5. Report Date
January 5, 2012
6. Performing Organization Code
7. Authors
Andy Mergenmeier, P.E., Harold Von Quintus, P.E, Jagannath Mallela, and Paul Littleton, P.E.
8. Performing Organization Report No.
9. Performing Organization Name and Address
Applied Research Associates, Inc. 100 Trade Centre Drive, Suite 200 Champaign, IL 61820
10. Work Unit No.
11. Contract or Grant No.
12. Sponsoring Agency Name and Address
Office of Infrastructure Federal Highway Administration 1200 New Jersey Avenue, SE Washington, DC 20590
13. Type of Report and Period Covered
Design and Construction Guide April 2010 – July 2011
14. Sponsoring Agency Code
15. Supplementary Notes
Contracting Officer’s Technical Representative: Byron Lord and Mary Huie Contracting Officer’s Technical Manager: Andy Mergenmeier
16. Abstract

In a coordinated effort with highway authorities and industry leaders, the Federal Highway Administration (FHWA) Every Day Counts initiative serves as a catalyst to identify and promote cost effective innovations to bring about rapid change to increase safety of our nations highway system, decrease project delivery time, and protect our environment. The Safety EdgeSM concept is an example of one such initiative in which the edge of the road is beveled during construction for the purpose of helping drivers who migrate off the roadways to more easily return to the road without over correcting and running into the path of oncoming traffic or running off the other side of the roadway.

This Design and Construction Guide shares the findings from ten demonstration projects in multiple states and other ad hoc projects in which the Safety EdgeSM was implemented. This Guide supports the FHWA's efforts to implement the Safety EdgeSM technology by providing standards, guidance, and specifications for adopting this treatment as a standard practice on all applicable new and resurfacing pavement projects.

The Guide provides information on the various elements to consider when designing and constructing pavement projects with the Safety EdgeSM. The Guide provides insights and lessons learned on previously constructed projects, highlighting items that may vary from conventional pavement design and construction.

17. Key Words
Safety EdgeSM, slope, asphalt concrete materials, PCC, roadway departure
18.Distribution Statement No restriction.
19. Security Classif.(of this report)
Unclassified
20. Security Classif. (of this page)
Unclassified
21. No. of Pages 22. Price

Form DOT F 1700.7 (8-72)


Table of Content

FOREWORD

SI* (MONDERN METRIC) CONVERSION FACTORS

SECTION 1: INTRODUCTION

1.1 INTRODUCTION
1.2 PURPOSE OF THE GUIDE
1.3 SCOPE OF THE GUIDE

SECTION 2: SAFETY EdgeSM – GENERAL DESIGN AND CONSTRUCTION CONSIDERATIONS

2.1 SAFETY EdgeSM USE

2.2 PRE-CONSTRUCTION AND DISCONTINUOUS PAVING OPERATIONS
2.3 PAVEMENT EDGE/SHOULDER PREPARATION
2.4 SLOPE MEASUREMENT
2.5 BACKING MATERIAL PLACEMENT

SECTION 3: SPECIFIC CONSIDERATIONS FOR CONSTRUCTING THE SAFETY EdgeSM IN CONJUNCTION WITH NEW AC PAVEMENTS OR AC OVERLAYS

3.1 DESIGN FEATURES AND SHAPE
3.2 EQUIPMENT – AC SAFETY EdgeSM DEVICES

3.3 ASPHALT CONCRETE MATERIALS
3.4 SAFETY EdgeSM CONSTRUCTION

3.5 QUALITY MEASUREMENT

SECTION 4: SPECIFIC CONSIDERATIONS FOR CONSTRUCTING THE SAFETY EdgeSMIN CONJUNCTION WITH NEW CONCRETE PAVEMENTS OR CONCRETE OVERLAYS

4.1 DESIGN FEATURES AND SHAPE
4.2 EQUIPMENT – PCC SAFETY EdgeSM DEVICES
4.3 CONCRETE MIXTURES
4.4 SAFETY EdgeSM CONSTRUCTION

4.5 QUALITY MEASUREMENT

REFERENCES

APPENDICES


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Page last modified on September 6, 2017
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Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000