Design Manual Metric 2009 Part 4 pdf

Design Manual Modified Design Level May 2001 Metric Version Page 430-5 Modified Design Level for Two-Lane Highways and Bridges Figure 430-4 Two-Lane Highways Trucks Under 10% Trucks 10% and Over Design Class MDL-9 MDL-10 MDL-11 MDL-12 MDL-13 MDL-14 Current ADT (1) Under 1000 1000-4000 Over 4000 Under 1000 1000-4000 Over 4000 Design Speed The posted speed, the proposed posted speed, or the operating speed, whichever is higher. Traffic Lane (2) Width 3.3 m 3.3 m 3.3 m 3.3 m 3.6 m 3.6 m Parking Lanes Urban 2.4 m 2.4 m 2.4 m (3) 2.4 m 2.4 m 2.4 m (3) Shoulder Width (4) 0.6 m 0.9 m (5) 1.2 m 0.6 m 0.9 m (5) 1.2 m Minimum Width for Bridges to Remain in Place (6)(7) 6.6 m (8) 7.2 m 8.5 m 6.6 m (8) 7.2 m 8.5 m Minimum Width for Rehabilitation of Bridges to Remain in Place (7)(9) 8.4 m (10) 9.6 m 9.6 m 8.4 m (10) 9.6 m 9.6 m Minimum Width for Replacement Full Design Level Applies (11) Access Control See Chapter 1420 and the Master Plan for Limited Access Highways, or WAC 468-52 and the region’s Highway Management Classification Report. (1) If current ADT is approaching a borderline condition, consider designing for the higher classification. (2) See Figures 430-5 and 430-6 for turning roadways. (3) Parking restriction recommended when ADT exceeds 7,500. (4) When curb section is used, the minimum shoulder width from the edge of traveled way to the face of curb is 1.2 m. On designated bicycle routes the minimum shoulder width is 1.2 m (See Chapter 1020). (5) For design speeds of 50 mph or less on roads of 2,000 ADT or less, width may be reduced by 0.3 m, with justification. (6) Use these widths when a bridge within the project limits requires deck treatment or thrie beam retrofit only. (7) Width is the clear distance between curbs or rails, whichever is less. (8) 6.0 m when ADT 250 or less. (9) Use these widths when a bridge within the project limits requires any work beyond the treatment of the deck such as bridge rail replacement, deck replacement, or widening. (10) 7.8 m when ADT 250 or less. (11) Modified design level lane and shoulder widths may be used when justified with a corridor or project analysis. Modified Design Level Design Manual Page 430-6 Metric Version May 2001 Minimum Total Roadway Widths for Two-Lane Highway Curves Modified Design Level Figure 430-5 Design Manual Modified Design Level May 2001 Metric Version Page 430-7 Minimum Total Roadway Widths for Two-Lane Highway Curves, D<90° Modified Design Level Figure 430-6 Modified Design Level Design Manual Page 430-8 Metric Version May 2001 Evaluation for Stopping Sight Distancefor Crest Vertical Curves Modified Design Level Figure 430-7 Design Manual Modified Design Level May 2001 Metric Version Page 430-9 Evaluation for Stopping Sight Distance for Horizontal Curves Modified Design Level Figure 430-8 Modified Design Level Design Manual Page 430-10 Metric Version May 2001 Main Line Roadway Sections Modified Design Level Figure 430-9 Design Manual Modified Design Level May 2001 Metric Version Page 430-11 Ramp Roadway Sections Modified Design Level Figure 430-10 Design Manual Full Design Level May 2001 Metric Version Page 440-1 440 Full Design Level Plans Preparation Manual, WSDOT, M 22-31 Local Agency Guidelines (LAG), M 36-63, WSDOT A Policy on Geometric Design of Highways and Streets (Green Book), 1994, AASHTO A Policy on Design Standards - Interstate System, 1991, AASHTO 440.03 Definitions auxiliary lane The portion of the roadway adjoining the through lanes for parking, speed change, turning, storage for turning, weaving, truck climbing, and other purposes supplemen- tary to through-traffic movement. bikeway Any trail, path, part of a highway or shoulder, sidewalk, or any other traveled way specifically signed and/or marked for bicycle travel. collector system Routes that primarily serve the more important intercounty, intracounty, and intraurban travel corridors, collect traffic from the system of local access roads and convey it to the arterial system, and on which, regardless of traffic volume, the predominant travel distances are shorter than on arterial routes (RCW 47.05.021). design speed The speed used to determine the various geometric design features of the roadway. frontage road An auxiliary road that is a local road or street located on the side of a highway for service to abutting property and adjacent areas and for control of access. functional classification The grouping of streets and highways according to the character of the service they are intended to provide. high pavement type Portland cement concrete pavement or asphalt cement concrete pavement on treated base. intermediate pavement type Asphalt cement concrete pavement on an untreated base. 440.01 General 440.02 References 440.03 Definitions 440.04 Functional Classification 440.05 Terrain Classification 440.06 Geometric Design Data 440.07 Design Speed 440.08 Traffic Lanes 440.09 Shoulders 440.10 Medians 440.11 Curbs 440.1 2 Parking 440.1 3 Pavement Type 440.1 4 Structure Width 440.1 5Grades 440.01 General Full design level is the highest level of design and is used on new and reconstructed highways. These projects are designed to provide optimum mobility, safety, and efficiency of traffic move- ment. The overall objective is to move the greatest number of vehicles, at the highest allowable speed, and at optimum safety. Major design controls are functional classification, terrain classification, urban or rural surroundings, traffic volume, traffic character and composition, design speed, and access control. 440.02 References Revised Code of Washington (RCW) 47.05.021, Functional classification of highways. RCW 47.24, City Streets as Part of State Highways Washington Administrative Code (WAC ) 468-18-040, “Design standards for rearranged county roads, frontage roads, access roads, intersections, ramps and crossings” Standard Plans for Road, Bridge, and Municipal Construction (Standard Plans), M 21-01, WSDOT Standard Specifications for Road, Bridge, and Municipal Construction (Standard Specifications), M 41-10, WSDOT. Design Manual Full Design Level May 2001 Metric Version Page 440-9 Geometric Design Data, Interstate Figure 440-4 Divided Multilane Design Class I-1 Design Year (1) Access Control (2) Full Separate Cross Traffic Highways Railroads All All Design Speed (mph) Rural 80 (3) Urban 70 Traffic Lanes Number Width (m) 4 or more divided 3.6 Median Width (m) 4 lane 6 lanes or more Rural —Minimum (4) Urban —Minimum 12 4.8 15 6.6 Shoulder Width (m) Right of Traffic 3.0 3.0 Left of Traffic 1.2 3.0 (5) Pavement Type (6) High Right of Way (7) Rural — Minimum Width (m) 19 from edge of traveled way Urban — Minimum Width (m) As required (8) Structures Width (9) (m) Full roadway width each direction (10) Grades (% ) (11) Design Speed (mph) Type of Terrain 50 60 70 80 Level 4 3 3 3 Rolling 5 4 4 4 Mountainous 6 6 5 5 Interstate Notes: 1 The design year is 20 years after the year the construction is scheduled to begin. 2 See Chapter 1420 for access control requirements. 3 80 mph is the desirable design speed, with justification the design speed may be reduced to 60 mph in mountainous terrain and 70 mph in rolling terrain. 4 Independent alignment and grade is desirable in all rural areas and where terrain and development permits in urban areas. 5 For existing 6-lane roadways, existing 1.8 m left shoulders may remain when no other widening is required. 6 Submit Form 223-528, Pavement Type Determination. 7 Provide right of way width 3.0 m desirable, 1.5 m minimum, wider than the slope stake for fill and slope treatment for cut. See Chapter 640 and the Standard Plans for slope treatment information. 8 In urban areas, make right of way widths not less than those required for necessary cross section elements. 9 See Chapter 1120 for minimum vertical clearance. 10 For median widths 7.8 m or less, address bridge(s) in accordance with Chapter 1120. 11 Grades 1% steeper may be used in urban areas where development precludes the use of flatter grades and for one-way down grades except in mountainous terrain. [...]... 2 64 329 395 46 1 527 593 659 725 791 856 922 988 2 .4 176 2 64 351 43 9 527 615 703 791 878 966 10 54 1 142 1230 1318 3.0 220 329 43 9 549 659 769 878 988 1098 1208 1318 142 7 1537 1 647 3.3 3.6 242 2 64 362 395 48 3 527 6 04 659 725 791 845 922 966 10 54 1087 1186 1208 1318 1329 144 9 144 9 1581 1570 1713 1691 1 845 1812 1976 6.6 48 3 725 966 1208 144 9 1691 1932 21 74 241 6 2657 2899 3 140 3382 3623 7.2 527 791 10 54. .. 7 9 3.0 30 24 24 10.8 ( 14) 9.6 ( 14) (15) Rural — Design Speed (mph) 40 50 60 7 8 10 36 12.0 ( 14) Grades (%) 30 None As required 36 Full Roadway Width ( 14) Type of Terrain 3.0 5 6 8 70 Urban — Design Speed (mph) 30 40 50 60 4 5 6 9 11 12 Design Manual May 2001 Geometric Design Data, Collector Figure 44 0-7a 9 10 12 7 8 10 6 7 9 Design Manual May 2001 Collector Notes: 1 2 3 4 5 6 7 8 9 10 Metric Version... Other Design Considerations-Urban (17) 3.0 None 3.0 30 24 As required (18) Full Roadway Width 36 (20) 24 36 24 12 (21) Design Manual May 2001 40 10.8 (21) Level Rolling Mountainous 5 6 8 Rural — Design Speed (mph) 50 60 70 4 5 7 3 4 6 3 4 5 45 9.6 (21) Urban — Design Speed (mph) 30 40 50 60 3 4 5 8 9 11 Figure 44 0-6a 7 8 10 6 7 9 24 Full Roadway Width (21) 80 Geometric Design Data, Minor Arterial ( 14) ... width 24 36 12.0 (22) 24 30 10.8 (22) 9.6 (22) Grades (%)(23) Rural — Design Speed (mph) 50 60 70 40 Level Rolling Design Manual May 2001 Type of Terrain 5 6 4 5 3 4 Mountainous 8 7 6 80 Urban — Design Speed (mph) 30 40 50 60 3 4 3 4 8 9 7 8 6 7 5 6 5 5 11 10 9 8 Geometric Design Data, Principal Arterial Figure 44 0-5a 24 Full roadway width (22) Design Manual May 2001 Principal Arterial Notes: 1 2 3 4 5... 30 40 30 4 or more divided 3.6 4 or 6 divided 3.6 2 3.6 2 3.6 2 3.6 4 3.6 4 or 6 3.3 3.0 3.0 2 .4 1.8 1.2 2 .4 2 .4 (8) Design Speed (mph) (9) Metric Version Mountainous Terrain Traffic Lanes Number Width (m) Shoulder Width (m) Right of Traffic (12) Left of Traffic Median Width (m) 4 lane (13) 12 ( 14) 1.2 0.6 18 6.6 1.2 0.6 3.0 None 3.0 24 65 None (18) (11) Variable None None None 3.0 High (20) (10) 4. 8... are in 44 0.11 Lateral clearances from the face of curb to obstruction are in Chapter 700 Except in mountainous terrain, grades 1% steeper may be used in urban areas where development precludes the use of flatter grades or for one-way downgrades Full Design Level Page 44 0-13 Geometric Design Data, Minor Arterial Figure 44 0-6b Full Design Level Page 44 0- 14 Undivided Multilane C-1 Rural Urban Design Class... requirements are in 44 0.11 Lateral clearances from the face of curb to obstruction are in Chapter 700 Except in mountainous terrain, grades 1% steeper may be used in urban areas where development precludes the use of flatter grades or for one-way downgrades Full Design Level Page 44 0-11 Geometric Design Data, Principal Arterial Figure 44 0-5b Full Design Level Page 44 0-12 Divided Multilane Design Class Two-Lane... Class (1) DHV in Design Year Non NHS NHS Urban Rural Where Warranted (6) Rural (4) Where Warranted (5) (5) All Urban 200 and under 300 and Under (4) Where Warranted (5) Where Warranted Design Speed (mph) 201-300 301-500 (4) (4) C -4 Urban (3) Over 301 Over 501 Over 900 Railroads Where Warranted Where Warranted (5) Where Warranted 70 70 60 70 60 60 60 30 50 40 50 40 40 30 4 Width (m) 60 40 (7) Mountainous... 0.001089 3.3 3.6 3.9 16.3 49 54 59 0.0096 29 32 35 0.23 0.000226 0.7 0.7 0.8 CSS-1 0 .45 0.00 045 2 1 .4 1.5 1.6 Fog Seal CSS-1 0.18 0.000181 0.5 0.6 0.7 Total CSS-1 0.63 0.0006 34 1.9 2.1 2.3 5 3 m per Specific Data 1 2 3 Asphalt Concrete Paving Quantities (metric tons/km)* Width (m) 1.2 Depth of Pavement (mm) 30 88 45 132 60 176 75 220 90 2 64 105 307 120 351 135 395 150 43 9 165 48 3 180 527 195 571 210 615... DHV in Design Year Rural Rural Urban Rural Urban Where Warranted Where Warranted 60 and Under 200 and Under Over 700 (5) (5) (5) (8) Rural (5) (5) Design Speed (mph) Urban M-5 61-200 201 -40 0 Over 40 1 Where Warranted (6) All (1) M -4 (4) Over 201 Over 700 Railroads (7) All Where Warranted Where Warranted Where Warranted (7) Where Warranted Where Warranted 70 70 60 70 60 60 60 70 50 40 50 40 40 30 40 (7) . base. 44 0.01 General 44 0.02 References 44 0.03 Definitions 44 0. 04 Functional Classification 44 0.05 Terrain Classification 44 0.06 Geometric Design Data 44 0.07 Design Speed 44 0.08 Traffic Lanes 44 0.09. Lanes 44 0.09 Shoulders 44 0.10 Medians 44 0.11 Curbs 44 0.1 2 Parking 44 0.1 3 Pavement Type 44 0.1 4 Structure Width 44 0.1 5Grades 44 0.01 General Full design level is the highest level of design and is used. (Standard Specifications), M 41 -10, WSDOT. Design Manual Full Design Level May 2001 Metric Version Page 44 0-9 Geometric Design Data, Interstate Figure 44 0 -4 Divided Multilane Design Class I-1 Design Year (1) Access