§ 15-08.002. Streets.

(a)

Streets shall be designed as follows:

(1)

The arrangement, design, extent, width, grade and location of all streets shall be considered in relation to existing and planned streets, to topographical conditions, to public convenience and safety, and in their appropriate relation to the proposed uses of the land to be served by such streets. This subsection is not intended to prohibit cul-de-sac which otherwise would meet the requirements of this part.

(2)

In all historic neighborhoods in which street layout and design are a part of and are directly related to identified elements of that neighborhood's historic character, all new streets shall conform to existing street design patterns.

(3)

All streets shall tie into existing streets or shall terminate in a cul-de-sac or other turnaround identified in the International Fire Code; except that when a street is part of a phased subdivision plan, that street may end without a cul-de-sac provided that a temporary turnaround is provided and a completion bond in the amount necessary to complete the construction of the cul-de-sac is posted.

(4)

Completed cul-de-sac streets shall not be permitted to be extended.

(5)

All new streets shall be located and designed so as to preserve mature trees when feasible, consistent with all other street design standards set forth in this part.

(b)

Residential collector and residential access streets shall be laid out so that their use by through traffic is discouraged.

(c)

Where a subdivision abuts or contains existing or proposed arterial or major collector streets, the bureau of planning may require a non-access reservation along said arterial or major collector streets and may further require that proposed building lots be served by newly developed local residential streets.

(d)

Reserved strips at the terminus of a new street are permitted only to the extent provided in subsection (a)(3) above and in section 15-08.005(a) below.

(e)

Centerlines of proposed intersections shall align with the centerline of existing streets or shall be offset at least 200 feet from the closest intersecting street.

(f)

Street intersections shall be as nearly at right angles as is possible.

(g)

Except as provided in Section 138-102.1 entitled Street and Sidewalk Standards for Negotiated Traditional Neighborhood Developments (NTND), Minimum street right-of-way and pavement widths shall be as follows:

Street Type	Right-of-Way	Pavement Width
Arterial street	114′	86′
Major collector street	80′	60′
Residential collector	50′	32′
Residential collector with bicycle lane	55′	37′
Residential access street and Residential subcollector	32′	28′

 

(h)

The minimum traveled way width for any street shall be 20 feet.

(i)

Five feet shall be added to right-of-way and pavement width required above when establishing new streets that will have bicycle lanes or when extending streets that have bicycle lanes.

(j)

Streets classified as "residential access street" and "residential subcollector" shall require a ten-foot utility easement on each side of the right-of-way.

(k)

The street classifications "residential access street" and "residential subcollector" shall be approved only for cul-de-sac streets or streets on a looped circular or semicircular alignment of 2,000 feet or less.

(l)

All cul-de-sac streets shall have a turnaround, at the closed end, with a minimum right-of-way radius for residential property of 47 feet for residential access streets and residential subcollectors, 60 feet for residential collectors and 75 feet for any other street.

(m)

Public alleys shall not be permitted. Private alleys shall be permitted, and the applicant shall provide a program for the maintenance for any such private alley.

(n)

Maximum street grades shall not exceed the following maximum grades:

Street	Maximum Grade
Arterial Street	6%
Major Collector	8%
Residential Collector	12%
Residential Access Street and Residential Subcollector	14%

 

(o)

No street grade shall be less than one percent.

(p)

Sight distance shall be as follows:

(1)

Horizontal alignment: 200 linear feet minimum sight distance.

(2)

Vertical alignment: Four percent for residential collector and six percent for residential access street and residential subcollector maximum rate of change in grade per 100-foot station and all vertical curves shall be symmetrical.

(q)

No street right-of-way shall be constructed closer to an exterior wall of a primary structure than the required front yard setback for that zoning district.

(Code 1977, § 15-08.002; Ord. No. 1997-01, § 2, 1-13-97; Ord. No. 2013-18(13-O-0426), § 1, 5-29-13; Ord. No. 2018-04(18-O-0602), § 2, 7-9-02 )