The Design Manual provides policies, procedures, and methods for developing and documenting the design of improvements to the transportation network in Washington. It has been developed for state facilities and may not be appropriate for all county roads or city streets that are not state highways.
December 2019 revision package M 22-01.18 (pdf 5.4 mb)
Design Manual September Webinar Videos
Individual Chapters / Revision History / Active Design Manual Revisions
Errata Page / Project Delivery Memos / Design Bulletin / Design Safety Research
Chapter 100 Manual Description (162 kb)
Chapter 110 Design-Build Projects (178 kb)
Chapter 210 Public Involvement and Hearings (606 kb)
Chapter 225 Environmental Coordination (109 kb)
Chapter 300 Design Documentation, Approval, and Process Review (313 kb)
Chapter 301 Design Maintenance Coordination (2.84 mb)
Chapter 305 Project Management (177 kb)
Chapter 310 Value Engineering (309 kb)
Chapter 320 Traffic Analysis (234 kb)
Chapter 321 Sustainable Safety Analysis (159 kb)
Chapter 400 Surveying and Mapping (570 kb)
Chapter 410 Monumentation (245 kb)
Chapter 510 Right of Way Considerations (176 kb)
Chapter 520 Access Control (176 kb)
Chapter 530 Limited Access Control (875 kb)
Chapter 540 Managed Access Control (238 kb)
Chapter 550 Freeway Access Revision (364 kb)
Chapter 560 Fencing (259 kb)
Chapter 610 Investigation of Soils, Rock, and Surfacing Materials (157 kb)
Chapter 620 Design of Pavement Structure (612 kb)
Chapter 630 Geosynthetics (31.1 mb)
Chapter 700 Project Development Roles and Responsibilities for Projects With Structures (103 kb)
Chapter 710 Site Data for Structures (163 kb)
Chapter 720 Bridges (355 kb)
Chapter 730 Retaining Walls and Steep Reinforced Slopes (1.1 mb)
Chapter 740 Noise Barriers (353 kb)
Chapter 800 Hydraulic Design (3279 kb)
Chapter 900 Roadsides (120 kb)
Chapter 950 Public Art (370 kb)
Chapter 1010 Work Zone Safety and Mobility (455 KB)
Chapter 1020 Signing (225 KB)
Chapter 1030 Delineation (381 kb)
Chapter 1040 Illumination (1.36 mb)
Chapter 1050 Intelligent Transportation Systems (1.2 mb)
Chapter 1100 Practical Design (465 kb)
Chapter 1101 Need Identification (141 kb)
Chapter 1102 Context Determination (500 kb)
Chapter 1103 Design Control Selection (356 kb)
Chapter 1104 Alternatives Analysis (115 kb)
Chapter 1105 Design Element Selection (127 kb)
Chapter 1106 Design Element Dimensions (125 kb)
Chapter 1120 Preservation Projects (97 kb)
Chapter 1210 Geometric Plan Elements (320 kb)
Chapter 1220 Geometric Profile Elements (296 kb)
Chapter 1230 Geometric Cross Section Basics (2.4 mb)
Chapter 1231 Geometric Cross Section - Highways (320 kb)
Chapter 1232 Geometric Cross Section - Freeways (450 kb)
Chapter 1238 Geometric Cross Section - Streetside and Parking (400 kb)
Chapter 1239 Geometric Cross Section - Shoulders, Side Slopes, Curbs, and Medians (400 kb)
Chapter 1240 Turning Roadways (204 kb)
Chapter 1250 Cross Slope and Superelevation (364 kb)
Chapter 1260 Sight Distance (851 mb)
Chapter 1270 Auxiliary Lanes (432 kb)
Chapter 1300 Intersection Control Type (1.4 mb)
Chapter 1310 Intersections (771 kb)
Chapter 1320 Roundabouts (2.6 mb)
Chapter 1330 Traffic Control Signals (1.5 mb)
Chapter 1340 Driveways (487 kb)
Chapter 1350 Railroad Grade Crossings (830 kb)
Chapter 1360 Interchanges (1.1 mb)
Chapter 1370 Median Crossovers (99 kb)
Chapter 1410 High-Occupancy Vehicle Facilities (576 kb)
Chapter 1420 HOV Direct Access (1.5 mb)
Chapter 1430 Transit Facilities (1.1 mb)
Chapter 1510 Pedestrian Facilities (1.7 mb)
Chapter 1515 Shared-Use Paths (2.3 mb)
Chapter 1520 Roadway Bicycle Facilities (1.1 mb)
Chapter 1600 Roadside Safety (615 kb)
Chapter 1610 Traffic Barriers (1.3 mb)
Chapter 1620 Impact Attenuator Systems (1.8 mb)
Chapter 1710 Safety Rest Areas and Traveler Services (761 kb)
Chapter 1720 Weigh Sites (2.3 mb)
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Date |
Version |
Complete |
Revision |
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2019 December |
M 22-01.18 |
PDF (50.8 MB) |
PDF (5.4 MB) |
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2019 September |
M 22-01.17 |
PDF (47.3 MB) |
PDF (22 MB) |
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2019 February |
M 22-01.16 |
PDF (36.8 MB) |
PDF (6.17 MB) |
| 2018 July |
M 22-01.15 |
PDF (37.2 MB) |
PDF (10.7 MB) |
| 2017 July |
M 22-01.14 |
PDF (38.0 MB) |
PDF (15.8 MB) |
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2016 July |
M 22-01.13 |
PDF (37.3 MB) |
PDF (4.80 MB) |
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2015 November |
M 22-01.12 |
PDF (37.4 MB) |
PDF (17.2 MB) |
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2014 July |
M 22-01.11 |
PDF (38.0 MB) |
PDF (14.0 MB) |
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2013 December |
Supplement |
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PDF (33.0 MB) |
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2013 July |
M 22-01.10 |
PDF (33.0 MB) |
PDF (11.8 MB) |
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2012 July |
M 22-01.09 |
PDF (33.1 MB) |
PDF (10.9 MB) |
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2012 March |
Supplement |
PDF (1.6 MB) |
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2011 August |
Supplement |
PDF (760 KB) |
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2011 July |
M 22-01.08 |
PDF (30.1 MB) |
PDF (7.6 MB) |
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2010 July |
M 22-01.07 |
PDF (29.2 MB) |
PDF (6.7 MB) |
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2009 December |
M 22-01.06 |
PDF (30.6 MB) |
PDF (8.3 MB) |
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2009 June |
M 22-01.05 |
PDF (31.7 MB) |
PDF (31.2 MB) |
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2009 January |
M 22-01.04 |
PDF (34.4 MB) |
PDF (17.4 MB) |
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2008 May |
M 22-01.03 |
PDF (29.2 MB) |
PDF (2.5 MB) |
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2007 November |
M 22-01.02 |
PDF (28.7 MB) |
PDF (7.7 MB) |
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2007 August |
Supplement |
PDF (628 KB) |
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2007 May |
M 22-01.01 |
PDF (29.3 MB) |
PDF (5.6 MB) |
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2006 November |
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PDF (33.6 MB) |
PDF (9.23 MB) |
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2006 June |
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PDF (7.4 MB) |
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2005 June |
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PDF (25.4 MB) |
PDF (3.1 MB) |
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2005 January |
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PDF (10.0 MB) |
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2004 May |
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PDF (21.8 MB) |
PDF (5.6 MB) |
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2003 December |
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PDF (20.5 MB) |
PDF (6.7 MB) |
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2003 May |
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PDF (18.7 MB) |
PDF (18.8 MB) |
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2002 December |
Supplement |
PDF (324 KB) |
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2002 September |
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PDF (25.0 MB) |
PDF (4.7MB) |
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2002 February |
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PDF (24.9 MB) |
PDF 11.9 MB) |
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2001 May |
English |
PDF (18.7 MB) |
PDF (5.9 MB) |
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Metric |
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PDF (5.8 MB) |
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2000 May |
English |
PDF (20.0 MB) |
PDF (5.2 MB) |
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Metric |
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PDF (4.8 MB) |
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1999 November |
English |
PDF (23.8 MB) |
PDF (2.2 MB) |
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Metric |
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PDF (3.2 MB) |
