§ 6.1.2. Streets and alleys.

[Amd. Ord. 12-99 3/16/99]

(A)

Improvement obligations. Concurrent, or prior to, construction associated with an approved development application, the development shall provide for the construction of improvements as identified in Section 5.3.1(C) and off-site improvements to the following extents. [Amd. Ord. 12-99 3/16/99]

(1)

When the street or alley is totally contained within a subdivision or development project, all improvements necessary to accommodate the demands and impacts of the project shall be provided. [Amd. Ord. 12-99 3/16/99]

(2)

When the street or alley is located on a boundary of the project, the project is responsible for providing one-half of the current costs (in cash funds) of such improvements along its property line unless the project requires greater participation as follows in subsections (a) or (b). [Amd. Ord. 12-99 3/16/99]

(a)

When access to the project is provided from a local street and/or alley, then the project must provide appropriate traffic lanes meeting requirements of Section 5.3.1(C) in order to provide continuous paved access from the nearest paved street or alley to the project in addition to the improvements on its side of the center line of right-of-way. [Amd. Ord. 12-99 3/16/99]

(b)

When additional travel lanes are required to accommodate demands made by the project, then the project needs to provide such additional traffic lanes in addition to the improvements on its side of the center line of right-of-way and those required by 6.1.2(A)(2)(a). [Amd. Ord. 18-07 5/15/07; [Amd. Ord. 12-99 3/16/99]

(3)

Off-site improvements must be provided as imposed by conditions of approval on the development application. [Amd. Ord. 12-99 3/16/99]

(B)

Principles of design. The following principles of street and alley design and layout shall be followed in the platting of subdivisions and development of single lots and large tracts of land. [Amd. Ord. 12-99 3/16/99]

(1)

The arrangement, character, extent, width, grade, and location of all streets shall conform to the Palm Beach County Thoroughfare Plan, the Florida Department of Transportation Highway Plan, and the Master Street Plan as contained in the Traffic Element of the Comprehensive Plan. Also, these factors shall be considered in their relation to existing and planned streets, to topographic conditions, to public convenience and safety, in their appropriate relationship to the proposed use of the land to be served by such streets, and the most advantageous development of the surrounding neighborhood.

(2)

A proposed street or alley layout shall provide for the continuation or projection of existing streets and alleys in the surrounding area unless the Planning and Zoning Board deems such extension undesirable for specific reasons of topography or design. [Amd. Ord. 12-99 3/16/99]

(3)

Any new street or alley that is an extension of an existing street or alley shall have the same width of right-of-way and be paved to the same widths as the existing street or alley provided that it must meet the minimum construction standards of these regulations and that such widths meet the minimum requirements of this Section. [Amd. Ord. 12-99 3/16/99]

(4)

Residential streets, alleys and access roadways shall be laid out to discourage through traffic, but provision for street and alley connections into and from adjacent areas will generally be required. [Amd. Ord. 12-99 3/16/99]

(5)

Where development abuts, or contains, an existing or proposed arterial street, the City may require marginal access streets, reverse frontages with screen planting contained in a non-access reservation along the rear property line, deep lots with rear service alleys, or such other treatment as may be necessary for adequate protection of residential properties and to afford separation of through and local traffic.

(6)

Where a development borders on or contains a railroad right-of-way, expressway, drainage canal, or waterway, the City may require a street approximately parallel to and on each side of the right-of-way, at a distance suitable for the appropriate land use of the intervening land. The distance shall also be determined with due regard for the requirements of approach grades for future bridges or grade separations.

(7)

Reserve strips controlling access to streets shall be prohibited except where their control is definitely placed in the City under approved conditions. Such reserve strips shall be required, as limited access easements, along all arterial and collector streets except for approved points of ingress and egress.

(8)

Curvilinear streets are recommended for residential, minor, and collector streets in order to discourage excessive vehicular speeds and to provide attractive vistas.

(9)

"T" intersections of minor and collector streets are encouraged.

(C)

Design requirements. The following standards shall be met in the design of all streets or alleys. [Amd. Ord. 12-99 3/16/99]

(1)

Curves.

(a)

Whenever a street or alley changes direction, or connection street lines deflect from each other by more than ten degrees, there shall be a horizontal curve.

(b)

A tangent shall be provided between reverse curves. The tangent shall have the minimum lengths of:

•

100 feet along collector streets

•

250 feet along arterial streets

(c)

Center line radii for horizontal curves shall be:

•

150 feet along local streets

•

300 feet along collector streets

•

500 feet along minor arterials

•

750 feet along major arterials

(2)

Intersections.

(a)

Streets shall be laid out to intersect as nearly as possible at right angles. No street shall intersect another at an angle of less than 60 degrees except at a "Y" intersection of local streets.

(b)

Intersections involving junction of more than two streets are prohibited except where found to be unavoidable by the Local Planning Agency.

(c)

As far as possible, intersections along arterial streets shall be located not less than 800 feet apart, measured from center line to center line.

(d)

Street jogs with center line off-sets less than 125 feet shall be avoided.

(e)

Property line radii shall be as follows:

•

25 feet along local streets

•

Greater than 25 feet, as determined by the City Engineer, at intersections which are less than 60 degrees

•

Edge of paving shall be on a minimum radii of 40 feet excepting in cases where the width of right-of-way does not so permit.

(3)

Paving widths.

(a)

Minimums. The following are the minimum paving widths which are required for the category of street or alley. [Amd. Ord. 08-10 4/20/10]; [Amd. Ord. 12-99 3/16/99]

CATEGORY	MINIMUM PAVING WIDTHS
Arterial Street	24 Feet
Collector Street	24 Feet
Local Street	22 Feet
Marginal Access Street	24 Feet
Access Roadway	24 Feet
Alleys	20 Feet

 

(b)

Additional paving. Additional width may be required by the City Engineer to promote public safety and welfare, and to assure adequate access, circulation, and parking in high-density residential areas, commercial areas, and industrial areas. To determine the necessity for additional pavement, the City Engineer may require the applicant to furnish a traffic impact analysis and, based upon this analysis, the City Engineer shall determine the extent to which any additional paving will be needed.

(c)

Reduction in paving width. A reduction in the required paving widths established in Subsection (3)(a), above, may be granted by the City Engineer upon a favorable recommendation from the Development Services Management Group (DSMG). Denial by the City Engineer may be appealed to the City Commission. [Amd. Ord. 08-10 4/20/10]

(4)

Dead-end streets and cul-de-sacs.

(a)

Rule. Dead-end streets without provision of a turnaround are prohibited. Generally, a cul-de-sac shall be required; however, in unique situations where a cul-de-sac cannot reasonably be accommodated either a "T" or "hammerhead" turn around may be accepted by the Local Planning Agency if approved by the Fire Marshal.

(b)

Temporary dead-ends. If a street is to be a through street but shall terminate in a dead-end for a significant period of time, a temporary turnaround shall be provided. The temporary turnaround shall be paved unless otherwise provided for by the Planning and Zoning Board.

(c)

Length. A dead-end street shall not exceed 1,000 feet except upon a finding by the Planning and Zoning Board that one or more of the following would occur:

•

The preservation of natural features and resources

•

Elimination of unnecessary traffic in the area

•

Preservation or increasing of open space.

(d)

Cul-de-sac turnaround design standards. The cul-de-sac shall be constructed to the following standards:

•

Minimum diameter to the outer edge of pavement, or curb line, of 90 feet.

•

Minimum diameter to property line of 100 feet.

(D)

Street and alley construction standards. Before any street or alley construction plans are approved by the City Engineer, he shall be satisfied that the following requirements, conditions, and standards are complied with. [Amd. Ord. 12-99 3/16/99]

(1)

Standard reference. The Florida Department of Transportation Specification for Road and Bridge Construction, Edition of 2007, as amended from time to time, and all Supplemental Specifications, all of which shall be hereinafter referred to as the DOT Specifications, are hereby made a part of this subsection. Where reference is made to the department in the DOT Specifications, it shall be construed to refer to the City. Any and all work not specifically mentioned hereafter shall be performed in accordance with the applicable portions of the DOT Specifications. [Amd. Ord. 06-08 3/18/08]

(2)

Clearing and grubbing. Unless specifically approved in the plans and specifications the entire width of the right-of-way shall be cleared and grubbed in accordance with Section 110 of the DOT Specifications.

(3)

Excavation and embankment. Excavation and fill, if called for in the approved plans and specifications, shall be in accordance with the applicable portions of Section 120 of the DOT Specifications.

(4)

Subgrade. The subgrade shall be uniformly stabilized to a depth of 12 inches to produce a Florida bearing value of 75 psi, in accordance with Section 160 in the DOT Specifications. A compaction of 98 percent of the maximum density as determined by AASHTO Method T-180 shall be deemed sufficient. Unless specifically deleted in the approved plans and specifications, shoulders eight feet in width on each side of the base course shall be stabilized in accordance with Section 160 of the DOT Specification. The subgrade shall be brought to true grade and approved by the City Engineer prior to installation of the base course. [Amd. Ord. 06-08 3/18/08]

(5)

Base course.

(a)

A base course of limerock as specified in Section 911 of the DOT Specifications or crushed concrete shall have a minimum depth of eight inches after compaction, and shall be compacted in two layers to the 98 percent dry density, all in accordance with the provisions of Section 200 of the DOT Specifications. Ocala formation or Miami Oolite formation is acceptable; minimum percentage of carbonates (of calcium and magnesium) in limerock material shall be 95 percent for Ocala limerock and 70 percent for Miami limerock. The width of the base course shall exceed the width of pavement as called for in the approved plans and specifications by 12 inches on each side. The use of forms for this course will not be required, and the use of suitable equipment shall be approved by the City Engineer. The base course shall be inspected and approved by the City Engineer prior to installation of the prime coat. [Amd. Ord. 06-08 3/18/08]

(b)

In case the above materials are not available, the City Engineer may allow deviations from the above specifications on a case by case basis. Alternate base materials must conform to DOT Specifications. [Amd. Ord. 06-08 3/18/08]

(6)

Priming. After approval, the base course shall be primed and a tack coat applied all in accordance with Section 300 of the DOT Specifications.

(7)

Surface course. The surface course shall be S-I or S-III hot laid asphaltic concrete and shall have a minimum depth of one and one-half inches after compaction. Width of paving shall be as called for in the approved plans and specifications and all work shall be in accordance with the applicable portions of Sections 320, 330, 331, and 332 of the DOT Specifications. Final inspection and approval of the surface course by the City Engineer shall be required. [Amd. Ord. 06-08 3/18/08]

(8)

Clean up. The site shall be cleared of all debris, excess fill, and equipment in a good and workmanlike manner as approved by the City Engineer.

(9)

Grade, drainage. The City Engineer shall approve the grade and drainage facilities for all construction before a permit shall be issued therefor.

(10)

Specifications for curbs and gutters. Where the road section approved by the Commission calls for curbs and gutters, they shall be constructed of Class I concrete with a minimum strength of 3,000 psi in accordance with Section 520 of the Florida Department of Transportation Standard Specifications for Road and Bridge Construction, Edition of 2007, as amended from time to time. [Amd. Ord. 06-08 3/18/08]