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«Signing and Marking Design Guidelines Signing and Marking Design Guidelines 9/22/2016 4.0 Atlanta, Georgia 30308 This document was developed as part ...»

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State of Georgia

Department of Transportation

Signing and Marking Design

Guidelines

Signing and Marking

Design Guidelines

9/22/2016

4.0

Atlanta, Georgia 30308

This document was developed as part of the continuing effort to provide guidance within the

Georgia Department of Transportation in fulfilling its mission to provide a safe, efficient, and

sustainable transportation system through dedicated teamwork and responsible leadership

supporting economic development, environmental sensitivity and improved quality of life. This document is not intended to establish policy within the Department, but to provide guidance in adhering to the policies of the Department.

Your comments, suggestions, and ideas for improvements are welcomed.

Please send comments to:

State Design Policy Engineer Georgia Department of Transportation One Georgia Center 600 W. Peachtree Street, 26th Floor Atlanta, Georgia 30308

DISCLAIMER

The Georgia Department of Transportation maintains this printable document and is solely responsible for ensuring that it is equivalent to the approved Department guidelines.

Signing and Marking Design Guidelines Revision History Revision Number Revision Date Revision Summary All - Revised and Combined Interstate and Limited Access 2.0 11/2008 Roadway Signing and Marking Design Guidelines and Non- Interstate Signing and Marking Design Guidelines 2.1 1/2011 All - Revised Figures Chapter 2 - Removed section 2.6 Detail Estimate Chapter 3 - Added Bicycle Warning and Share the Road Sign Guidance and Revised Figures Specified 36” for Warning Signs on State Routes Appendix A - Revised Legend and Figures 3.0 12/2013 All – Major Revision 3.1 10/2015 Section 2.4 - Changed General Notes location.

Section 2.5 - Changed the Reflective Sheeting Section 3.

1- Removed pavement marking plans Section 3.1.

2 - Changed “or” to “and/or”.

Section 3.1.

4 - Removed Type 3

–  –  –

Table of Contents Revision History

List of Effective Chapters

Table of Contents

Chapter 1. Introduction - Contents

1.1 Definitions

1.2 Applicable Standards and Specifications

Chapter 2. General Information - Contents

2.1 Drafting Standards

2.2 Electronic File Structure

2.2.1 Cell Libraries

2.3 Signing and Marking Plan Sheets

2.3.1 Required Information

2.3.1.1 Pavement markings:

2.3.1.2 Raised pavement markers:

2.3.1.3 Signs:

2.3.2 Sheet Layout

2.4 General Notes

2.5 Summary of Quantities Sheets

2.6 Sign Detail Sheets

2.7 Clearance Diagrams

Chapter 3. Sign Design Standards - Contents

3.1 General Sign Guidelines

3.2 Regulatory Signs

3.2.1 Stop Signs (R1-1)

3.2.2 Yield Signs (R1-2)

3.2.3 Speed Limit Signs (R2-1)

3.2.4 Right (Left) Lane Must Turn Right Signs (R3-7)

3.2.5 Keep Right Signs (R4-7)

3.2.6 Do Not Enter Signs (R5-1)

3.2.7 Wrong Way Signs (R5-1a)

3.2.8 Divided Highway Crossing Signs (R6-3)

3.2.9 State Line Signing

3.3 Warning Signs

3.3.1 W3-1 and W3-3

3.3.2 W3-5

Rev 4.0 Table of Contents

9/22/16 Page v Signing and Marking Design Guidelines 3.3.3 Road Name Signs Used in Conjunction with Warning Signs (W16-8)

3.3.4 Bicycle Warning Signs (W11-1)

3.3.5 Share the Road Signs (W16-1)

3.4 Guide Signs

3.4.1 Route Markers

3.4.1.1 Placement Guidelines

3.4.1.2 Mile Post Signing

3.4.2 Political Boundary Signs

3.4.3 Directional Signs for Recreation and Cultural Interest Areas

3.4.3.1 Memorial or Dedication Signs

3.4.4 Tourist-Info Visitor Center

3.4.5 Lettering Guidelines

3.5 School Zone and Pedestrian Crossing Signs

3.6 Overhead Span Wire Signs

3.7 Sign Posts

3.7.1 Description

3.7.2 Wind Loads

Chapter 4. Location and Sequence of Signs (Interstate/Limited Access) - Contents

4.1 Exit Signing

4.2 Post-Interchange Sequence Signing

4.3 Mile point Signs

4.4 Political Boundary Signs

4.4.1 Specialty Signs for Champion Signs

4.5 Waterway Signs

4.6 Hospital Signs

4.7 Bridge Caution Signs

4.8 No Trucks Over 6 Wheels Allowed in Left X Lanes Signs

4.9 Truck Use I-285

4.10 Emergency Parking Only Signs

4.11 Up to $1,200 Fine for Throwing Trash on Highway Signs

4.12 Slower Traffic Keep Right Signs

4.13 Keep Off Median Signs

4.14 Reduced Speed Ahead Signs

4.15 Overhead Regulatory Signs

4.16 Miscellaneous Signs

Chapter 5. Specific Sign Sequencing for Particular Applications - Contents

5.1 Lane Reduction for Interstates

–  –  –

5.2 Lane Reduction for Conventional Roads

5.3 Lane Drop – Continuous to Exit Lane

5.4 Lane Drop – Auxiliary Lane

5.5 Lane Drop – Drop Option

Chapter 6. Standard Signs - Contents

6.1 General

Chapter 7. Sign Layouts for Special Roadside and Overhead Highway Signs - Contents.





............. 7-i

7.1 General

Chapter 8. Special Roadside Signs Interstates/Freeways- Contents

8.1 General

8.2 Placement

Chapter 9. Overhead Highway Signs/Structures - Contents

9.1 General

9.2 Placement

Chapter 10. Clearance Diagrams for Overhead Signs - Contents

10.1 General

10.2 Design Elements

Chapter 11. Specific Service Signs (Logo Signs) - Contents

11.1 General

Chapter 12. Pavement Marking Designs Standards - Contents

12.1 Materials

12.1.1 Pavement Marking Selection Chart

12.2 Pavement Markings

12.2.1 Edge lines

12.2.2 Bicycle Lanes

12.2.3 Crosswalks

12.2.4 Borders

12.2.5 Pavement Marking “ONLY”

12.2.6 Pavement Marking Arrows

12.3 Raised Pavement Markers

12.4 Guidance on Marking Crosswalks

12.4.1 Controlled Intersections:

12.4.2 Uncontrolled Intersections:

Chapter 13. Roundabout Signing and Marking - Contents

13.1 General

13.2 Signing

13.2.1 Advanced Warning Signs

Rev 4.0 Table of Contents

9/22/16 Page vii Signing and Marking Design Guidelines 13.2.2 Yield Sign

13.2.3 Guide Signs

13.2.4 Other Regulatory Signs

13.3 Marking

13.3.1 Yield Line

13.3.2 Lane Use

13.3.3 Multilane

13.3.4 Pedestrian Crossings

13.3.5 Rumble Strips

13.3.6 Marking Materials

13.3.7 Guidance on Marking Crosswalks

Appendix A. Index and Legend

Appendix B. Typical Signing and Pavement Marking

Appendix C. Bicycle Signing and Marking

Appendix D. Summary of Quantities

Appendix E. General Notes

Appendix F. Figures

–  –  –

Chapter 1. Introduction - Contents

Chapter 1. Introduction - Contents

1.1 Definitions

1.2 Applicable Standards and Specifications

–  –  –

Chapter 1. Introduction

These design guidelines provide standards, guidelines, and specifications that will be used for the design of traffic signing and pavement markings prepared for the Georgia Department of Transportation (GDOT). These design guidelines include a compilation of specific drafting and design standards, plan and specification presentations, and review procedures to ensure that construction documents properly convey the extent and character of work to be performed. Sound traffic engineering judgment shall be exercised in applying these guidelines. Along with the companion document on traffic signal design, these documents contain comprehensive guidelines intended to provide consistency in plans for traffic control devices.

This document replaces previous editions of Non-Interstate Signing and Marking Design Guidelines and Interstate and Limited Access Roadway Signing and Marking Design Guidelines.

1.1 Definitions AASHTO “Green Book” – A Policy on Geometric Design of Highways and Streets as published by the American Association of State Highway and Transportation Officials (AASHTO), latest edition adopted by GDOT. Design standards outlined in this publication shall govern most geometric considerations. This publication provides guidance on the physical design of highways and streets.

Conventional Road – A street or highway other than a freeway, expressway or special purpose road.

Entrance ramp end – The point, as defined in the AASHTO “Green Book,” where the full width of the ramp entering a facility becomes less than the full lane width.

Guide signs – Show route designations, destinations, directions, distances, services, points of interest, and other geographical, recreational, or cultural information.

Interstate – A freeway (divided highway with full control of access).

MUTCD – Manual on Uniform Traffic Control Devices – Approved by the Federal Highway Administration as the national standard for the placement and standardization of all signs, signals, and markings placed on public facilities.

Non-Interstate – An expressway (a divided highway with partial control of access).

Overhead signs – Signs that are manufactured using extruded aluminum panels and are mounted over the roadway facility.

Type I, bridge overhead sign structure – A horizontal structure that spans the roadway and  is supported at each end by columns.

Type II, cantilever overhead sign structure – A horizontal structure that is supported at one  end by a single column. No new Type II structures shall be installed.

Type III, butterfly overhead sign structure – A horizontal structure that extends in opposite  directions from a single column support.

Type IV, combination overhead sign structure – A horizontal structure with two supports,  only one of which is at one end of the structure.

–  –  –

Type V, cantilever overhead sign structure – A single, rigid, tube-type horizontal arm that is  supported at one end by a single tubular support pole.

Type VI, bridge overhead sign structure – A single, rigid, tube-type horizontal structure that  is supported at both ends by single tubular support poles.

Type VII, bridge-mounted overhead sign structure – A structural frame that is attached to a  grade-separation structure. Caution is to be used in attaching signs to bridges in accordance with the February 8, 1980 memorandum from J.T. Kratzer, PE, State Bridge Engineer, to Archie C. Burnham, PE, State Traffic and Safety Engineer.

Type VIII, butterfly overhead sign structure – Single rigid tube type horizontal arms  extending in opposite directions from a single column support.

Physical gore – The point, as defined in the AASHTO “Green Book,” where the ramp intersects with the mainline facility and the pavement surface changes.

Regulatory signs – Give notice of traffic laws or regulations.

Special Purpose Road – A low-volume, low speed road that serves recreational areas or resource development activities.

Special roadside signs – Guide signs that are manufactured using extruded aluminum panels and that are ground-mounted.

Theoretical gore (“painted gore”) – The point, as defined in the AASHTO “Green Book,” where the ramp separates from the mainline facility.

Warning signs – Give notice of a situation that might not be readily apparent.

1.2 Applicable Standards and Specifications

The following specific documents will govern all work efforts:

GDOT Standard Specifications – Construction of Transportation Systems – Latest edition and supplements thereto. Documents listed below provide more detail concerning specific traffic engineering design elements, but all work must be in accordance with the GDOT Standard Specifications.

GDOT Signing and Marking Details GDOT Standard Detail Sheets GDOT Construction Details GDOT Plans Presentation Guide (PPG) GDOT Electronic Data Guidelines (EDG) MUTCD – Latest edition adopted by GDOT. This document shall govern those aspects of the application of all signs, signals, and pavement markings.

Standard Highway Signs (Federal Highway Administration [FHWA]) Americans with Disabilities Act

–  –  –

AASHTO “Green Book” – A Policy on Geometric Design of Highways and Streets as published by AASHTO, latest edition adopted by GDOT. Design standards outlined in this publication shall govern most geometric considerations. This publication provides guidance on the physical design of highways and streets.

AASHTO Standard Specifications for Structural Supports for Highway Signs, Luminaries, and Traffic Signals – This document provides criteria for structural design.

FHWA Work Zone Traffic Control Practices Manual

–  –  –

Chapter 2. General Information - Contents

Chapter 2. General Information - Contents

2.1 Drafting Standards

2.2 Electronic File Structure

2.2.1 Cell Libraries

2.3 Signing and Marking Plan Sheets

2.3.1 Required Information

2.3.1.1 Pavement markings:

2.3.1.2 Raised pavement markers:

2.3.1.3 Signs:

2.3.2 Sheet Layout

2.4 General Notes

2.5 Summary of Quantities Sheets

2.6 Sign Detail Sheets

2.7 Clearance Diagrams

–  –  –

2.1 Drafting Standards Drafting standards shall follow the requirements of the EDG.

2.2 Electronic File Structure Electronic file structure shall follow the requirements of the EDG.

2.2.1 Cell Libraries The Office of Traffic Operations has a cell library that contains standard cells for signs and pavement marking items. The signing and marking design cell file (as well as other GDOT design cell files) is available from the GDOT ROADS web site.



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