§ 17.8.610 STREETS.
   A.   Improvements. No shall occur unless the has or approved to a public :
      1.    within a and adjacent shall be improved in accordance with this article;
      2.   Any new or additional width planned as a portion of an existing shall be dedicated and improved in accordance with this Code;
      3.   New shall be connected to a collector or arterial by a paved ;
      4.   Where transportation-related improvements are required as a result of a transportation study pursuant to § 17.1.225D., the developer shall install said improvements to the satisfaction of the , or participate in the financing of said improvement where the impacts are beyond the responsibility of one project; and
      5.   The may a future improvement guarantee in lieu of or other transportation related improvements if one or more of the following conditions exist:
         a.   A partial improvement is not feasible due to the inability to achieve proper design standards;
         b.   A partial improvement may create a potential safety hazard to motorists or pedestrians;
         c.   Due to the nature of existing on adjacent properties it is unlikely that improvements would be extended in the foreseeable future and the improvement associated with the project under review does not, by itself, provide a significant improvement to safety or capacity;
         d.   The improvement would be in conflict with an adopted capital improvement plan;
         e.   The improvement is associated with an approved land on property zoned residential and the proposed land does not create any new ; or
         f.   Additional planning work is required to define the appropriate design standards for the and the is for a project that would contribute only a minor portion of the anticipated future traffic on the .
      6.   Improvements to shall be made according to adopted standards, unless the determines that the standards will result in an unacceptable adverse impact on existing or on the proposed or on natural features such as , steep slopes or existing mature .
   B.   Creation of rights-of-way for and related purposes. Rights-of-way shall be created through the approval of a final   or major ; however, the may approve the creation of a by acceptance of a , provided that such is deemed essential by the for the purpose of general traffic circulation:
      1.   The may approve the creation of a by of without full compliance with the regulations applicable to or major if any one or more of the following conditions are found by the to be present:
         a.   Establishment of a is initiated by the and is found to be essential for the purpose of general traffic circulation, and partitioning or of land has an incidental effect rather than being the primary objective in establishing the road or v for public ; or
         b.   The tract in which the road or is to be dedicated is an isolated ownership of one or less and such is recommended by the Commission to the based on a finding that the proposal is not an attempt to evade the provisions of this title governing the control of or major .
      2.   With each for approval of a road or right-of-way not in full compliance with the regulations applicable to the standards, the proposed shall be made a condition of and major approval:
         a.   The shall submit such additional information and justification as may be necessary to enable the Commission in its review to determine whether or not a recommendation for approval by the shall be made;
         b.   The recommendation, if any, shall be based upon a finding that the proposal is not in conflict with the purpose of this title;
         c.   The Commission in submitting the proposal with a recommendation to the may attach conditions which are necessary to preserve the standards of this title; and d. All of shall be in a form prescribed by the and shall name “the public” as grantee.
   C.   Creation of   . The may approve an   established by without full compliance with this title provided such an is the only reasonable method by which a large enough to develop can be created:
      1.      shall be provided and maintained in accordance with the Uniform Fire Code;
      2.    shall be in accordance with §§ 17.8.100 et seq.
   D.    location, width and . Except as noted below, the location, width and of all shall conform to an approved plan and shall be considered in their relation to existing and planned , to topographic conditions, to public convenience and safety, and in their appropriate relation to the proposed of the land to be served by such :
      1.    grades shall be approved by the in accordance with subsection M. below; and
      2.   Where the location of a is not shown in an approved plan, the arrangement of in a shall either:
         a.   Provide for the continuation or appropriate of existing in the surrounding areas; or
         b.   Conform to a plan adopted by the Commission, if it is impractical to conform to existing patterns because of particular topographical or other existing conditions of the land. Such a plan shall be based on the type of land to be served, the volume of traffic, the capacity of adjoining and the need for public convenience and safety.
      3.   The may require   due to topography, the size and shape of the tract, or other conditions.
   E.   Minimum rights-of-way and widths. Unless otherwise indicated on an approved plan, or as needed to continue an existing improved , right-of-way and roadway widths shall not be less than the minimum width described below. Where a range is indicated, the width shall be determined by the appropriate decision-making authority based upon anticipated average daily traffic (ADT) on the new segment. These are presented in Table 8-7 .
      1.   The decision-making body shall make its decision about desired right-of-way width and pavement width of the various types within the or after consideration of the following:
         a.   The type, design and location of the road as set forth in the Transportation System Plan. Standards for specific identified in the Transportation System Plan shall apply;
         b.   Anticipated traffic generation;
         c.   On- parking needs;
         d.   Sidewalk and requirements;
         e.   Requirements for placement of utilities;
         f.    lighting;
         g.   Drainage and impacts;
         h.      location;
         i.   Planting and landscape areas;
         j.   Safety and comfort for motorists, bicyclists and pedestrians; and
         k.    needs for emergency vehicles.
Table 8-7:  Standards
Classification
Minimum R.O.W. Width
Minimum Roadway Width
Table 8-7:  Standards
Classification
Minimum R.O.W. Width
Minimum Roadway Width
Principal Arterial
90-96 feet
52-64 feet
Arterial
66 feet
40 feet
Collector
66 feet
40 feet
Local Industrial
66 feet
40 feet
Local  
58 feet
32 feet
Local  
54 feet
28 feet[1]
Local  
50 feet
24 feet[2]
Local  
50 feet[3]
15 feet[4]
Neighborhood Route
54 feet
28 feet[7]
58 feet
32 feet
Circular end of
55 feet (radius)
42 feet (radius)
50 feet
24 feet[5]
Circular end of
40 feet (radius)
34 feet (radius)[6]
15 feet
12 feet
Half-
35 feet
24 feet[8]
Footnotes:
[1] These shall not exceed 330 feet in length for any one segment. Each end of the segment shall connect to an existing or planned with a minimum roadway width of 32 feet. Fire hydrants shall be placed at one-third intervals along the segment. shall be placed in a manner to provide queuing space to allow for adequate traffic passage including emergency vehicles.
[2] These shall not exceed 330 feet in length for any one segment or the length needed to traverse a wetland or . Each end of the segment shall connect to an existing or planned with a minimum roadway width of 32 feet. Fire hydrants shall be placed at one-third intervals along the segment. On- parking is permitted on one side only.
[3] right-of-way may be reduced if approved by the to preserve natural features, crossing a wetland or or where construction of a full-width would result in excessive cut and fill due to existing topography.
[4] One-way traffic only; no on- parking permitted. One-way may be permitted only to preserve natural features or where the construction of a full-width would result in excessive cut-and-fill due to existing topography, as determined by the .
[5] No on- parking permitted.
[6] Sidewalks permitted adjacent to curb.
[7] On- parking permitted on one side only.
[8] Half- improvements apply where a new requires the installation of a new or extension of an existing on the boundary of the project in order to provide to that . The standard identified in the table is based on two 12-foot travel lanes and no parking shall be allowed on either side of the . The developer may have the option to widen the to 16-foot lane widths in one or both directions. Where a lane width is 16 feet, on- parking is allowed for that lane. Such widening does not change sidewalk and parkway requirements.
 
   F.   Future plan and extension of .
      1.   A future plan shall:
         a.   Be filed by the in conjunction with an for a or . The plan shall show the pattern of existing and proposed future from the boundaries of the proposed land division and shall include other parcels within 500 feet surrounding and adjacent to the proposed land division. At the ’s request, the shall prepare a future proposal. A proposal may be modified when subsequent proposals are submitted; and
         b.   Identify existing or proposed bus routes, pullouts or other transit facilities, bicycle routes and pedestrian facilities on or within 530 feet of the .
      2.   For new residential and t, possible local connections to vacant or primary undeveloped land must be identified in conformance with projections outlined on the Local Connectivity Plan, as shown on the Map.
      3.   Where necessary to give or permit a satisfactory future division of adjoining land, shall be extended to the boundary lines of the tract to be developed; and
         a.   These extended or stubs to adjoining properties are not considered to be since they are intended to continue as through at such time as the adjoining property is developed.
         b.   A barricade shall be constructed at the end of the by the property owners which shall not be removed until authorized by the , the cost of which shall be included in the construction cost.
         c.   Temporary hammerhead turnouts or temporary bulbs shall be constructed for stub in excess of 150 feet in length.
   G.    alignment and connections.
      1.   Staggering of making “T” intersections at collectors and arterials shall not be designed so that jogs of less than 300 feet on such are created, as measured from the centerline of such .
      2.   Spacing between local intersections shall have a minimum separation of 125 feet.
      3.   All local and minor collector that a shall be extended within the to provide through circulation when not precluded by environmental or topographical constraints, existing patterns or strict adherence to other standards in this Code. A connection or extension is considered precluded when it is not possible to redesign or reconfigure the pattern to provide required extensions. Land is considered topographically constrained if the is greater than 15% for a distance of 250 feet or more. In the case of environmental or topographical constraints, the mere presence of a constraint is not sufficient to show that a connection is not possible. The must show why the constraint precludes some reasonable connection.
      4.   Proposed or extensions shall be located to provide direct to existing or planned transit stops, commercial services and other neighborhood facilities, such as , shopping areas and parks.
      5.   All should provide an internal network of connecting that provide short, direct travel routes and minimize travel distances within the .
   H.   Intersection angles.  shall be laid out so as to intersect at an angle as near to a right angle as practicable, except where topography requires a lesser angle, but in no case shall the angle be less than 75o unless there is special intersection design, and:
      1.    shall have at least 25 feet of tangent adjacent to the right-of-way intersection unless topography requires a lesser distance;
      2.   Intersections which are not at right angles shall have a minimum corner radius of 20 feet along the right-of-way lines of the acute angle; and
      3.   Right-of-way lines at intersection with arterial shall have a corner radius of not less than 20 feet.
   I.   Existing rights-of-way. Whenever existing rights-of-way adjacent to or within a tract are of less than standard width, additional rights-of-way shall be provided at the time of or .
   J.   Partial improvements. Partial improvements resulting in a pavement width of less than 20 feet; while generally not acceptable may be approved where essential to reasonable when in conformity with the other requirements of these regulations, and when it will be practical to require the improvement of the other half when the adjoining property developed.
   K.    . A shall be no more than 200 feet long, shall not provide to greater than 20 units, and shall only be used when environmental or topographical constraints, existing pattern, or strict adherence to other standards in this Code preclude extension and through circulation.
      1.   All shall terminate with a turnaround. Use of turnaround configurations other than circular shall be approved by the .
      2.   The length of the shall be measured along the centerline of the roadway from the near side of the intersecting to the farthest point of the .
      3.   If a is more than 300 feet long, a lighted direct pathway to an adjacent may be required to be provided and dedicated to the .
   L.    names. No name shall be used which will duplicate or be confused with the names of existing in Washington County, except for extensions of existing . names and numbers shall conform to the established pattern in the surrounding area.
   M.   Grades and curves. Grades shall not exceed 10% on arterials, 12% on collector , or 12% on any other (except that local or residential   may have segments with grades of up to 15% for distances of no greater than 250 feet), and:
      1.   Centerline radii of curves shall not be less than 700 feet on arterials, 500 feet on major collectors, 350 feet on minor collectors, or 100 feet on other ; and
      2.    intersecting with a minor collector or greater functional classification , or intended to be posted with a stop sign or signalization shall provide a landing averaging 5% or less. Landings are that portion of the within 20 feet of the edge of the intersecting at full improvement.
   N.   Curbs, curb cuts, ramps and approaches. Concrete curbs, curb cuts, wheelchair, bicycle ramps and approaches shall be constructed in accordance with standards specified in this chapter; and:
      1.   Concrete curbs and approaches are required; except
      2.   Where no sidewalk is planned, an asphalt approach may be constructed with approval; and
      3.   Asphalt and concrete approaches to the property line shall be built to configuration standards.
   O.    adjacent to railroad right-of-way. Wherever the proposed contains or is adjacent to a railroad right-of-way, provision shall be made for a approximately parallel to and on each side of such right-of-way at a distance suitable for the appropriate of the land. The distance shall be determined with due consideration at cross or the minimum distance required for approach grades and to provide sufficient depth to allow screen planting along the railroad right-of-way in nonindustrial areas.
   P.    control.  control as described for each classification of within the transportation element (Transportation System Plan (TSP), shall be implemented when a new or extension is built.
   Q.    to arterials and major collectors. Where a abuts or is traversed by an existing or proposed arterial or major collector , the design shall provide adequate protection for residential properties and shall separate residential and through traffic, or if separation is not feasible, the design shall minimize the traffic conflicts. The design shall include any of the following:
      1.   A parallel    along the arterial or major collector;
      2.    of suitable depth abutting the arterial or major collector to provide adequate buffering with along another ;
      3.   Screen planting at the or property line to be contained in a non- reservation along the arterial or major collector; or
      4.   Other treatment suitable to meet the objectives of this subsection;
      5.   If a has to two with different classifications, primary should be from the lower classification .
   R.    , public or private.
      1.    shall be no less than 15 feet in width. In commercial and industrial districts, shall be provided unless other permanent provisions for to off- parking and loading facilities are made.
      2.   While intersections and sharp changes in alignment shall be avoided, the corners of necessary intersections shall have a radius of not less than 12 feet.
   S.   Survey monuments. Upon completion of a improvement and prior to acceptance by the , it shall be the responsibility of the developer’s registered professional land surveyor to provide certification to the that all boundary and interior monuments shall be reestablished and protected.
   T.   Private .
      1.   Design standards for private shall be established by the ; and
      2.   The shall require legal assurances for the continued maintenance of private , such as a recorded maintenance agreement.
      3.   Private serving more than six units are permitted only within planned , parks and multi- residential .
   U.   Railroad crossings. Where an adjacent results in a need to install or improve a railroad crossing, the cost for such improvements may be a condition of approval, or another equitable means of cost distribution shall be determined by the Public Works Director and approved by the Commission.
   V.      . The shall install all  , relative to traffic control and names, as specified by the for any . The cost of shall be the responsibility of the developer.
   W.   Traffic signals. The location of traffic signals shall be noted on approved plans. Where a proposed intersection will result in an immediate need for a traffic signal, a signal meeting approved specifications shall be installed. The cost shall be included as a condition of .
   X.    light standards.  lights shall be installed in accordance with regulations adopted by the ’s direction.
   Y.    name .  name shall be installed at all intersections. Stop and other may be required.
   Z.    cross-sections. The final lift of asphalt concrete pavement shall be placed on all new constructed public roadways prior to final acceptance of the roadway and within one year of the conditional acceptance of the roadway unless otherwise approved by the . The final lift shall also be placed no later than when 90% of the in the new are completed or three years from the commencement of initial construction of the , whichever is less.
(Ord. 2009-01, passed 3-9-2009)