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Table of Contents TABLE OF CONTENTS TABLE OF CONTENTS……………………………………………………………………. i CHAPTER 1 GENERAL CONSIDERATIONS ……………………………..……….. .. 1 1-01 AUTHORITY …………………………………………………………………………………………………….. 1 1-02 PURPOSE ………………………………………………………………………………………………………… 1 1-03 APPLICABILITY ……………………………………………………………………………………………….. 1 1-04 ADMINISTRATIVE INTERPRETATIONS AND REVISIONS ……………………………………… 2 1-05 DEVIATION FROM STANDARDS ……………………………………………………………………….. 3 1-06 POLICIES ……………………………………………………………………………………………..………… 4 1-07 REFERENCES ……………………………………………………………………………………….…………. 5 A. General ……………………………………………………………………………………………....................... 5 1-08 ALTERNATE STANDARDS …………………………………………………………………………….…… 6 1-09 PERMITS ………………………………………………………………………………………………………… 7 1-10 PLAN REVIEW ………………………………………………………………………………….…………..…. 7 1-11 PROFESSIONAL QUALIFICATIONS …………………………………………………………………….. 7 1-12 INSPECTION ………………………………………………………………………………….……………….. 7 1-13 SECURITIES ………………………………………………………………………………….………………… 8 1-14 ERRORS AND OMISSIONS ……………………………………………………………….………………. 8 1-15 RIGHT-OF-WAY AND SITE MAINTENANCE …………………………………….…………………… 8 1-16 PENALTIES …………………………………………………………………………………….……………….. 8 1-17 DEFINITIONS ………………………………………………………………………………………………….. 9 CHAPTER 2 ACCESS ………………………………………………………..………… . 23 2-01 ACCESS REQUIREMENTS ……………………………………………………………………………….. 23 A. General ……………………………………………………………………………………………………………….. 23 B. Design …………………………………………………………………………………………………………………. 23 C. State Highway Access ……………………………………………………………………………………………. 24 2-02 NUMBER OF ACCESS POINTS ………………………………………………………………………….. 24 A. Residential …………………………………………………………………………………………..………………. 24 B. Commercial/Industrial …………………………………………………………………………………………… 24 C. Additional Access Points ………………………………………………………………………………………… 24 2-03 ACCESS POINT TYPES AND SPECIFICATIONS …………………………………………………… 25 (Standard Drawings 2-010, 2-020, 2-025, 2-030, 2-035, 2-040, 2-045) A. General ………………………………………………………………………………………………………………… 25 B. Width Requirements – Residential …………………………………………………………………………… 25 C. Width Requirements – Commercial ……………………………………………………………………….... 25 2-04 ACCESS P0INT LOCATION, SEPARATION AND SPACING ……………………………………. 26 (Standard Drawing 2-050) A. General …………………………………………………………………………………………………….…….……. 26 B. Residential ……………………………………………………………………………………………………………. 26 C. Commercial ………………………………………………………………………………………………………….. 27 2-05 CORNER CLEARANCE FROM INTERSECTIONS …………………………………………….…….. 27 (Standard Drawing 2-060) A. Residential ……………………………………………………………………………………………………………. 27 B. Commercial …………………………………………………………………………………………………………… 27 2-06 HORIZONTAL ALIGNMENT OF ACCESS POINTS ……………………………….……………….. 27 2-07 VERTICAL ALIGNMENT OF ACCESS POINTS …………………………………….……………….. 27 (Standard Drawing 2-070) A. General ………………………………………………………………………………………………………….…….. 27 2-08 CONSTRUCTION OF ACCESS POINTS ………………………………………………………………. 28 A. General ………………………………………………………………………………………………………………… 28 2-09 SIGHT DISTANCE …………………………………………………………………………………………… 28 CHAPTER 2 DRAWING INDEX …………………………………………………………………………………….. 29 Engineering Design and Development Standards 2010 i CHAPTER 3 ROAD DESIGN ……………………………………………………….….. 31 3-01 ROAD CIRCULATION ……………………………………………………………………………………… 31 A. General ……………………………………………………………………………………………………………….. 31 B. Layout and Design ……………………………………………………………………………………….....…… 31 3-02 ROAD CLASSIFICATION …………………………………………………………………………………. 32 A. Arterial Classifications …………………………………………………………………………………….……… 32 B. Non-Arterial Classifications …………………………………………………………………………………….. 33 3-03 RIGHT-OF-WAY WIDTH ………………………………………………………………………………….. 33 A. Standards …………………………………………………………………………………………………………….. 33 Table 3-1 Standard Right-of-Way Widths ……………………………………………………………….. 34 B. Right-of-Way Width Evaluation ………………………………………………………………………………. 34 C. Separate Tracts …………………………………………………………………………………………………….. 34 3-04 PUBLIC ROAD STANDARDS: ARTERIALS AND NON-ARTERIALS ………………….……… 34 (Standard Drawings 3-010, 3-020, 3-030A & B, 3-040, 3-050, 3-060 and 3-065) A. General ………………………………………………………………………………………………………………... 34 B. Concrete Road Standards ………………………………………………………………………….…………. 35A 3-05 PRIVATE ROADS AND ACCESS WAYS …………………………………………………….………. 35A (Standard Drawings 3-060, 3-070, 3-075, 3-080, 3-100 and 3-102) A. Private Roads …………………………………………………………………………………………….....……. 35A B. Fire Apparatus Access Roads (Fire Lanes) ……………………………………………………………… 35B C. Drive Aisles …………………………………………………………………………………………………………. 35B D. Alleys ………………………………………………………………………………………………..………………. 35B E. Auto Courts ………………………………………………………………………………..……………….……… 35C F. Woonerfs ………………………………………………………………………………………………………..…. 35D G. Shared and Common Driveways …………………………………………………………………….……… 35E H. Primitive Road …………………………………………………………………………………………………….... 36 I. Trail Access Permit Road ………………………………………………………………………………………… 36 3-06 HORIZONTAL ALIGNMENT ……………………………………………………………………………… 36 (Standard Drawing 3-105) A. Design Speed …………………………………………………………………………………..…………………… 36 Table 3-2 Design Speed for Non-Arterial Roads ………………………………………………………. 37 B. Operating Speed …………………………………………………………………………………………………… 37 Table 3-3 Modifiers to Determine Operating Speed …………………………………………………. 38 C. Horizontal Curve Radii and Superelevation …………………………………………………..………….. 38 Table 3-4 Horizontal Curves Minimum Radii and Superelevation ………………………….……. 38 3-07 VERTICAL ALIGNMENT …………………………………………………………………………………… 39 (Standard Drawings 3-110, 3-120) A. Grades …………………………………………………………………………………………………..……..……… 39 Table 3-5 Maximum Grades …………………………………………………………………………….……. 40 B. Vertical Curves ……………………………………………………………………………………………………… 40 3-08 SIGHT DISTANCE …………………………………………………………………………………………… 40 (Standard Drawings 3-130, 3-140) A. General ………………………………………………………………………………………………………………… 40 B. Stopping Sight Distance …………………………………………………………………………………………. 41 Table 3-6 Stopping Sight Distance …………………………………………………..…………………….. 41 C. Effect of Grade on Stopping Sight Distance ……………………………………………………………… 42 Table 3-7 Stopping Sight Distance on Grades …………………………………………………………. 42 D. Intersection Sight Distance ……………………………………………………………………………………. 42 Table 3-8 Intersection Sight Distance < 80 ADT ……………………………………….…………….. 44 Table 3-9 Intersection Sight Distance > 80 ADT ………………………………………….………….. 44 E. Clear Sight Triangles …………………………………………………………………………….……………….. 45 See Standard Drawing 3-140 F. Special Circumstances ………………………………………………………………………………….……….. 45 G. Documentation of Sight Distance ………………………………………………………………….………… 46 3-09 INTERSECTIONS ………………………………………………………………………….………………… 46 A. Angle of Intersections ………………………………………………………………………………….………… 46 B. Grades at Intersections ……………………………………………………………………………….…………. 46 C. Radius Returns ……………………………………………………………………………………………………… 47 ii Engineering Design and Development Standards 2010 Table 3-10 Minimum Radius Returns ………………………………………………………………..……. 47 D. Centerline Offsets …………………………………………………………………………………………………. 47 Table 3-11 Minimum Centerline Offset …………………………………………………………………… 47 3-10 ROAD ENDS ………………………………………………………………………………………………….. 48 (Standard Drawing 3-150) A. General ………………………………………………………………………………………………………………… 48 B. Drop Curb Cul-de-Sac ……………………………………………………………………………………………. 48 3-11 AUXILIARY LANES ………………………………………………………………………………….……… 49 3-12 HIGH OCCUPANCY VEHICLE (HOV) LANES ………………………………………………….…… 49 3-13 TRANSIT STOPS ……………………………………………………………………………………………. 49 (Standard Drawing 3-160) A. General Requirements ………………………………………………………..…………………………………. 49 3-14 PEDESTRIAN CIRCULATION ……………………………………………………………………………. 50 (Standard Drawings 3-010, 3-020, 3-040, 3-050, 3-060 and 3-065) A. Pedestrian Facility Options ……………………………………………………………………………….……. 51 Table 3-12 Pedestrian Facility Standards ………………………………..………………………………. 51 CHAPTER 3 DRAWING INDEX ……………………………………………………………………………………… 53 CHAPTER 4 ROAD ELEMENTS AND FEATURES ………………………..…………… 55 4-01 LANDSCAPING ……………………………………………………………………………………….……… 55 (Standard Drawings 4-010 through 4-120) A. Planter Strips ………………………………………………………………………………………………………… 55 B. Planting Types ………………………………………………………………………………………………………. 55 C. Tree Planting and Maintenance ………………………………………………………………………………. 56 D. Stormwater Facility Landscaping ……………………………………………………….……………………. 56 4-02 MEDIANS ………………………………………………………………………………………………………. 57 A. General ………………………………………………………………………………………………………………… 57 4-03 SURVEY MONUMENTS AND CORNERS ……………………………………………………………… 57 (Standard Drawing 4-130) A. General ………………………………………………………………………………………………………………… 57 4-04 CURB DETAILS …………………………………………………………………………………….………… 58 (Standard Drawings 4-140, 4-145) A. Vertical Curb and Gutter ………………………………………………………………………………………… 58 B. Other …………………………………………………………………………………………………………………… 58 4-05 CONCRETE SIDEWALKS ………………………………………………………………………….……… 59 (Standard Drawing 4-150) A. General ………………………………………………………………………………………………………………… 59 B. Width …………………………………………………………………………………………………………………… 60 C. Thickness …………………………………………………………………………………………………………….. 60 D. Curb Ramps ……………………………………………………………………………………………….…………. 60 4-06 ASPHALT WALKWAYS …………………………………………………………………………………….. 62 (Standard Drawings 3-010, 3-030A & B, 3-040, 3-060 and 4-160) A. General ………………………………………………………………………………………………………………… 62 B. Design ………………………………………………………………………………………………………..……….. 62 4-07 SHARED USE PATHS ………………………………………………………………………………………. 63 A. General ……………………………………………………………………………………………………..…………. 63 B. Design …………………………………………………………………………………………………..…………….. 63 4-08 BIKEWAYS …………………………………………………………………………………………………….. 63 (Standard Drawings 3-010, 3-020, 3-030A and 3-040) A. General ………………………………………………………………………………………………………………… 63
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