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A. Purpose. The purpose of this section is to establish additional transportation standards for development which meet the infill development standards detailed in Chapter 20.920. Except as codified by Section 11.80.060, all other provisions of Title 11 apply.

B. Applicability. This section applies to development applications that meet the eligibility criteria for infill development detailed in Chapter 20.920.

C. Review Authority. The Development Review Authority will approve, approve with conditions, or deny development applications in accordance with the provisions of this chapter, and the determinations of the Director.

D. Integration with SEPA. The provisions of this chapter are not intended to limit the application of SEPA (RCW Chapter 43.21C) to development approvals. Each development application subject to review under the provisions of this chapter and under the provisions of SEPA may be conditioned or denied pursuant to SEPA, with respect to transportation-related impacts and traffic safety impacts, independently of the provisions of this chapter, provided that environmental review under SEPA may rely upon compliance with this chapter to mitigate adequately for identified adverse environmental impacts.

E. Street Frontage Improvements.

1. Infill developments are required to provide full half-street frontage improvements along arterial roadways.

2. On non-arterial roadways, infill developments are required, at a minimum, to meet the predominant characteristic/condition of the existing fronting roadway where the majority of parcels are already developed. Partial frontage improvement, subject to the requirements of this section, is possible. For example, if the predominant roadway characteristic (as defined using the calculation methodology below) is improved with curb and gutter but not sidewalk, the subject development would be required to provide curb and gutter.

3. Requirements for half-street frontage improvements are subject to the following criteria:

a. The project under review will provide street frontage improvements to a standard defined by the predominant existing or potential condition along the fronting roadway.

The predominant existing or potential condition is defined by considering the existing frontage condition for all parcels fronting the half street without development or redevelopment potential; if less than 50% have frontage improvements or have only partial improvements, the subject development must meet that standard. Where 50% or more have full improvements or have the potential for development or redevelopment, half-street frontage improvements are required. Redevelopment potential is defined as any parcel eligible to subdivide and develop under Chapter 20.100.010, any vacant parcel, or any parcel with only an accessory structure.

b. Corner parcels must provide full half-street frontage improvements on arterial roadways and be evaluated according to Section 11.80.060 E 3 for each non-arterial fronting street.

c. In cases where the Director finds that other pending or approved but unconstructed developments on the same street frontage would cause the calculation in Section 11.80.060 E 3 to exceed 50%, or where other recorded covenants requiring frontage improvements exist for parcels on the same frontage, or where the Director finds that the deferral will cause an adverse impact or create dangerous or hazardous condition, the Transportation Director may require half-street frontage improvements.

F. Internal Driveways and Roadways.

1. At a minimum, infill development is subject to the internal private roadway standards listed in Table 11-80.060.F-1.

Table 11.80.060.F-1. Minimum Internal Driveway and Roadway Standards

Total Number of Dwelling Units Served

Minimum Standards

1 - 4

1 - 4

5 - 20

More than 20

Road Length (ft)

150 or fewer

More than 150

More than 150

More than 150

Road Width (ft)





2. Asphalt concrete surface and rock base will vary by soil type as defined in the City’s transportation standard details – private street standard plan. Roadways constructed as LID facilities shall meet the requirements of VMC Chapter 14.25.

3. In addition, private access roads serving infill developments must:

a. Have a maximum length of 400 feet, measured along the centerline from the intersecting street curb line to the end of the street or the back of the turnaround.

b. Have adequate turning radii, provision for vehicle turnaround when a dead end private access road exceeds 150 feet in length as approved by the Fire Chief, and vertical curve clearance.

c. Have a minimum vertical clearance of 13 feet 6 inches.

d. Provide signage saying “No Parking – Fire Lane” and curb painting on both sides of the access roadway (all roads less than 28 feet clear width). Signs must be installed at the entrance to the fire access route, and at 50-foot intervals along the route. The signs must be visible in both directions along the road. Additionally, curb and/or pavement permanent paint denoting “No Parking – Fire Lane” is required between the fire lane signage. The required signage and curb markings must comply with the sign standards of the US Department of Transportation and City requirements.

e. The road surface must be capable of supporting the weight of the heaviest firefighting apparatus.

f. Stormwater management is required per VMC Chapter 14.25.

4. Such internal driveways and roadways must be treated as a street, and all setback requirements of this ordinance apply.

5. Alternate structural sections may be approved by the City Traffic Engineer for subgrade soils having “R” values greater than 35, and for equivalent cement concrete sections.

6. A certificate of occupancy will not be issued for any such residential dwelling unit unless such private roads have been constructed, and thereafter posted for “no parking,” if required. The owner is responsible for enforcing such parking limitations.

7. The total number of units served will be calculated from the existing on-site development and the potential lots served by the roadway from adjacent off-site development. Where potential lots exist on a nearby (but not adjacent) parcel, the Transportation Director may require that the roadway be constructed to a standard to also serve those future trips.

8. Prior to final approval, the infill development application must include a copy of and proof of recording of a joint use and maintenance agreement for any properties which will be served by the private infill roadway.

9. In cases where the Director and/or Fire Marshal find that the proposed private roadway improvements will cause an adverse impact or create a dangerous or hazardous condition, the Director will require standard public roadway improvements, as defined by Title 11. (Ord. M-4197 §12, 2016; Ord. M-4026 §10, 2012)