§ 155.652 GENERAL PROVISIONS.
   The following general provisions shall apply to the dedication, construction, improvement or other development of all public streets in the city.
   (A)   Relationship. The location, width and grade of streets shall be considered in their relation to existing and planned streets, to topographical conditions, to public convenience and safety and to the proposed use of the land to be served by the streets.
   (B)   Development proposals. Development proposals shall provide for the continuation of existing principal streets where necessary to promote appropriate traffic circulation in the vicinity of the development. All new developments may be required to provide joint-use access to all adjacent undeveloped or underdeveloped parcels.
   (C)   Reserve strips. Reserve strips will not be approved unless necessary for the protection of the public welfare or of substantial property rights, and in these cases they may be required. The control and disposal of the land composing such strips shall be placed within the jurisdiction of the city under conditions approved by the Planning Commission.
   (D)   Alignment. Road alignment shall conform to the city public works design standards.
   (E)   Future extension of streets. Where necessary to give access to or permit a satisfactory future development of adjoining land, streets shall be extended to the boundary of a tract being developed and the resulting dead-end streets may be approved without turnarounds. Reserve strips may be required to preserve the objectives of street extensions.
   (F)   Intersection angles. Streets shall be laid out to intersect at angles as near to right angles as practical. Intersection design shall conform to the city public works design standards.
   (G)   Existing streets. Whenever existing public streets adjacent to or within a tract are of inadequate width, additional right-of-way shall be provided at the time of subdivision or development.
   (H)   Cul-de-sacs.   
      (1)   Cul-de-sacs shall be used only when exceptional topographical constraints, existing development patterns, or compliance with other standards in this code preclude a street extension and circulation. A cul-de-sac shall not be more than 400 feet in length and shall not provide access to more than 20 dwelling units.
      (2)   All cul-de-sacs shall terminate with a turnaround in accordance with the specifications in the public works design standards. The radius of circular turnarounds may be larger when they contain a landscaped island, parking bay in their center, Tualatin Valley Fire and Rescue submits a written request, or an industrial use requires a larger turnaround for truck access.
      (3)   Public easements, tracts, or right-of-way shall provide paved pedestrian and bicycle access ways at least six feet wide where a cul-de-sac or dead-end street is planned, to connect the ends of the streets together, connect to other streets, or connect to other existing or planned developments in accordance with the standards of this subchapter, the Transportation System Plan, public works design standards or other provisions identified in this code.
   (I)   Street names. No street names shall be used which will duplicate or be confused with the names of existing streets, except for extensions of existing streets. Street names and number shall conform to the established pattern in the city and shall be subject to the approval of the Planning Commission.
   (J)   Grades and curves. Grades and curves shall conform to the city public works design standards. Where existing conditions, particularly topography, make it otherwise impractical to provide buildable sites, the City Engineer may accept steeper grades and sharper curves.
   (K)   Alleys. Alleys shall be provided in commercial and industrial districts unless other permanent provisions for access to off-street parking and loading facilities are made as approved by the City Engineer. Alleys shall be constructed consistent with the city Public Works Design Standards.
   (L)   Sidewalks. Sidewalks shall conform to the city public works design standards. Curbs and sidewalks shall be required along both sides of all public streets. All new development upon lots, tracts or parcels of land adjacent to a public street will be required to construct curbs and sidewalks.
   (M)   Bike lanes. Bike lanes shall be provided where required by the city’s Transportation System Plan and shall be designed and constructed in compliance with the city’s Public Works Design Standards.
   (N)   Street trees. Street trees shall be provided and shall be a species identified on the Washington County approved street trees list.
   (O)   Access spacing standards. Access spacing standards shall comply with Washington County’s standards on county roads and the city Transportation System Plan and Public Works Design Standards on city roads.
(Prior Code, § 16.150.010) (Ord. 427, passed 5-16-2016)