Title 17H Engineering Standards
Chapter 17H.010 Street Development Standards
Section 17H.010.050 Right-of-Way
- Public right-of-way widths shall be in accordance with the city's comprehensive plan, the city’s engineering design standards or as directed by the director of engineering services. Minimum right-of-way widths are as shown in Tables 17H.010-1 and 17H.010-2. The right-of-way width varies based on the required street elements including number of lanes, on-street parking, bike lanes, medians, turn lanes, roadside swales, pedestrian buffer strips, transit needs and street trees.
- Where infill development occurs on partially constructed blocks, the proposed right-of-way width shall at least match the existing right-of-way width for the rest of the block and adjoining blocks.
- Private streets shall be located on a tract; street easements are not permitted. The width of the tract for private streets shall meet the minimum right-of-way widths designated in Tables 17H.010-1 and 17H.010-2.
- Public rights-of-way or private tracts shall contain all street elements including paving, curbing, gutters and pedestrian buffer strips or swales in accordance with the city’s design standards.
- Sidewalks may be located on easements on private property.
- Narrower right-of-way widths may be allowed at the discretion of the director of engineering services. Variance requests will be evaluated based on topography, traffic circulation, emergency vehicle access, zoning, existing development and on-street parking requirements.
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Table 17H.010-1
Arterial Right-of-way Widths
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Right-of-way Width
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Street Width
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Minimum1
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Typical
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Curb to Curb
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ARTERIAL (all types)
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2 lanes2
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60 ft
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60 ft – 80 ft
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Varies3
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3 lanes2
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65 ft
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65 ft – 80 ft
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Varies3
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4 lanes2
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75 ft
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75 ft – 100 ft
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Varies3
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5 lanes2
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90 ft
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80 ft – 100 ft
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Varies3
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6 lanes2
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100 ft
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90 ft - 110 ft
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Varies3
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7 lanes2
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100 ft
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90 ft – 125 ft
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Varies3
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Notes:
1Additional right-of-way may be required if roadside swales are used to control storm drainage, for bike lanes if designated on the plan, or for wider sidewalks depending on the zoning.
2Lanes can be through lanes, turn pockets, or continuous TWLTL.
3Curb-to-curb width varies depending on street features including number of lanes, on-street parking, bike lane, median and turn lanes. See Design Standards for more detail.
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Table 17H.010-2
Local Access Right-of-way and Street Widths
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Minimum Right-of-way Width1
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Minimum Street Width
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Sidewalks in ROW
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Sidewalks on Easements
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Curb to Curb
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LOCAL ACCESS
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Commercial/
Industrial
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60 ft.
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50 ft.
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36 ft.
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Residential High Density2
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60 ft.
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50 ft.
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36 ft.
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Residential Standard3
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56 ft.
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46 ft.
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32 ft.
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Residential One-side Parking4
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51 ft.
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41 ft.
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27 ft.
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Hillside Development4,5
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40 ft.
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35 ft.
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27 ft.
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Cul-de-sac (radius)
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56 ft.
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51 ft.
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50 ft.
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Alley6
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20 ft.
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20 ft.
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12 ft.
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Notes:
1Additional right-of-way may be required if roadside swales are used to control storm drainage.
2Appropriate in areas where parking on both sides of the street is expected on a regular basis, such as apartment complexes. Refer to SMC 17H.010.070 for more information.
3Appropriate in areas where homes have street-facing garages and driveways for parking. On-street parking is used by visitors and extra vehicles. Refer to SMC 17H.010.070 for more information.
4Parking is allowed on one side of the street only. Refer to SMC 17H.010.120 for on-street parking requirements.
5Refer to SMC 17H.010.110 for more information.
6Alleys do not require sidewalk or curb. The widths shown apply to right-of-way and pavement width.
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Date Passed: Monday, November 30, 2020 Effective Date: Sunday, January 3, 2021 ORD C35985 Section 2 |
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