DESIGN MANUAL, PART 2 HIGHWAY DESIGN

1 Table of Contents Publication 13M (DM-2) 2015 Edition - Change #1 TOC - 1 DESIGN MANUAL, PART 2 HIGHWAY DESIGN TABLE OF CONTENTS CHAPTER SUBJECT PAGE CHAPTER 1 GENERAL DESIGN INTRODUCTION ..1 - 1 STANDARDS FOR ROADWAY CONSTRUCTION ..1 - 3 DESIGN CRITERIA ..1 - 3 A. Definitions of DESIGN Criteria ..1 - 4 B. Functional Classifications, Typologies, and Low Cost Safety Measures ..1 - 7 C. Minimum Width Criteria for Bridges .. 1 - 26 D. Shoulder Criteria for New Construction and Reconstruction Projects.

2 1 - 30 E. DESIGN Criteria for Resurfacing, Reconstruction and Rehabilitation (3R) Projects .. 1 - 31 PAVEMENT PRESERVATION CRITERIA .. 1 - 37 A. Non-Freeway Criteria .. 1 - 37 B. Freeway Criteria .. 1 - 37 THIS SECTION IS INTENTIONALLY LEFT BLANK .. 1 - 38 TYPICAL ROADWAY CROSS SECTIONS .. 1 - 38 Interstate and Other Limited Access Freeways .. 1 - 40 Arterials .. 1 - 52 Arterials, Collectors and Local Roads .. 1 - 56 Collectors and Local Roads .. 1 - 58 Typical Pavement Widening .. 1 - 60 Typical Roadway Cross Section Notes.

3 1 - 62 ACCELERATION AND DECELERATION (SPEED-CHANGE)AUXILIARY LANES .. 1 - 64 CONTROL OF ACCESS .. 1 - 64 STAGE CONSTRUCTION .. 1 - 66 APPENDIX A Reduced bridge Width Criteria Documentation .. 1A - 1 CHAPTER 2 DESIGN ELEMENTS AND DESIGN CONTROLS INTRODUCTION ..2 - 1 HORIZONTAL ALIGNMENT ..2 - 1 VERTICAL ALIGNMENT ..2 - 2 CONTROLS FOR COMBINATION HORIZONTAL AND VERTICAL ALIGNMENTS ..2 - 2 SIMPLE CURVE COMPUTATIONS ..2 - 3 SURVEY AND CONSTRUCTION BASELINES ..2 - 4 MINIMUM RADIUS.

4 2 - 8 A. Definition ..2 - 8 B. DESIGN for Rural Highways, Urban Freeways and High-Speed Urban Streets ..2 - 8 C. DESIGN for Low-Speed Urban Streets ..2 - 8 - 9 CRITICAL LENGTH OF 2 - 10 DESIGN SPEED .. 2 - 10 A. Projects with New or Modified Speed Posting .. 2 - 11 B. Projects Maintaining Existing Speed Posting .. 2 - 11 C. Existing Roadways with No Posted Regulatory Speed Limit .. 2 - 11 D. Non-Applicable DESIGN Speeds .. 2 - 11 TERRAIN .. 2 - 11 CLIMBING LANES .. 2 - 12 Step 1 CT - Sept. 2016 Table of Contents Publication 13M (DM-2) 2015 Edition - Change #1 TOC - 2 VERTICAL CURVES.

5 2 - 13 A. General Considerations .. 2 - 13 B. Crest Vertical Curves .. 2 - 13 C. Sag Vertical Curves .. 2 - 13 2 - 13 A. General ..2 - 13 B. Rates of Superelevation .. 2 - 15 C. Maximum Superelevation .. 2 - 15 D. Superelevation Transition (T) .. 2 - 15 E. Application of Superelevation .. 2 - 2325 F. Superelevation of City Streets .. 2 - 2426 G. Superelevation for Curves on Ramps .. 2 - 2426 TRAVELED WAY WIDENING ON HORIZONTAL CURVES .. 2 - 2426 TRANSITION (SPIRAL) CURVES AND COMPUTATIONS .. 2 - 2527 AIRPORT - HIGHWAY CLEARANCES.

6 2 - 3133 SIGHT DISTANCE .. 2 - 3133 A. General .. 2 - 3133 B. Criteria for Measuring Sight Distance .. 2 - 3133 C. Passing Sight Distance for Two-Lane Highways .. 2 - 3133 D. Stopping Sight Distance .. 2 - 3337 E. Decision Sight Distance .. 2 - 3438 F. Intersection Sight Distance .. 2 - 3438 G. Sight Distance for Multilane Highways .. 2 - 3539 H. Sight Distance on Horizontal Curves .. 2 - 3539 OTHER ELEMENTS AFFECTING GEOMETRIC DESIGN .. 2 - 3640 A. Traffic Control Devices .. 2 - 3640 B. Intelligent Transportation Systems.

7 2 - 3640 C. Erosion Control .. 2 - 3640 D. Landscape Development .. 2 - 3741 E. Railroad- HIGHWAY Grade Crossings .. 2 - 3741 F. Drainage .. 2 - 3741 G. Lighting .. 2 - 3741 H. Safety Rest Areas, Welcome Centers and Scenic Overlooks .. 2 - 3842 I. Utilities .. 2 - 3842 J. Bicycle Facilities .. 2 - 3842 K. Noise Control and NoiseSound 2 - 3842 L. Structures .. 2 - 3943 M. Pedestrian Facilities .. 2 - 3943 N. HIGHWAY Capacity Analysis .. 2 - 3943 O. Mass Transit Facilities .. 2 - 3943 P. Special Purpose Roads.

8 2 - 3943 Q. Traffic Barriers .. 2 - 4044 R. Curbs and Driveways .. 2 - 4044 S. Maintenance of Traffic Through Construction Areas .. 2 - 4044 T. Outer Separations and Border Areas .. 2 - 4044 U. Median Crossovers .. 2 - 4145 DESIGN CONTROLS .. 2 - 4650 A. DESIGN Vehicles .. 2 - 4650 B. Driver Performance and Human Factors .. 2 - 4650 C. Traffic Characteristics .. 2 - 4751 D. Safety .. 2 - 4852 E. Environment .. 2 - 4852 F. Economic Analysis .. 2 - 4852 VERTICAL CLEARANCE REQUIREMENTS .. 2 - 4852 A.

9 Strategic HIGHWAY Network (STRAHNET) .. 2 - 4852 B. Bridges over Railroads .. 2 - 4953 C. Pedestrian Overpasses .. 2 - 4953 Step 1 CT - Sept. 2016 Table of Contents Publication 13M (DM-2) 2015 Edition - Change #1 TOC - 3 D. Traffic Signals .. 2 - 4953 E. Utility Lines .. 2 - 4953 APPENDIX A Vertical Clearance DESIGN Exception Coordination with Surface Deployment and Distribution Command Transportation Engineering Agency (SDDCTEA) .. 2A - 1 CHAPTER 3 INTERSECTIONS INTRODUCTION ..3 - 1 OBJECTIVES AND FACTORS FOR DESIGN CONSIDERATIONS.

10 3 - 1 TYPES OF INTERSECTIONS ..3 - 1 GEOMETRIC DESIGN ELEMENTS ..3 - 2 A. Alignment and Profile ..3 - 2 B. Types of Turning - 2 C. Sight Distance ..3 - 3 D. Superelevation ..3 - 4 E. Traffic Islands ..3 - 4 F. Median Openings ..3 - 4 G. Acceleration and Deceleration (Speed-Change)Auxiliary Lanes ..3 - 5 H. Direct and Indirect Left Turns and U-Turns ..3 - 5 I. Auxiliary Lanes ..3 - 5 JI . Curb Radii for Turning Movements in Urban Areas ..3 - 5 KJ. Free-Flow Turning Roadways at Intersections ..3 - 5 LK. Channelization.