§ 7.5-65. Street design criteria.

(1)

AASHTO standards: Road design shall conform to AASHTO (American Association of State Highway and Transportation Official(s)) requirements as published in "A Policy on Geometric Design of Highways and Streets" 1994 edition as amended, unless otherwise noted herein.

(2)

Minimum design speed and maximum grade: Minimum design speeds and maximum grades for proposed streets in the City of Cartersville by street classification shall be as follows:

Street Type	Maximum Allowable Grade	Minimum Required Design Speed
Arterial	7%	55 MPH
Major Collector	10%	45 MPH
Minor Collection	12%	35 MPH
Local	12%	30 MPH
Alleys	12%	N/A
Cul-de-sac	4%	N/A

 

(3)

Minimum street grade: Minimum grade on culs-de-sac shall be one and one-half (1.5) percent to maintain one (1) percent in curb line. Minimum street grade outside of culs-de-sac shall be one (1) percent.

(4)

Site distance at entrances:

(a)

Sight distance requirements along existing city roads shall be determined using the posted speed limit and the corresponding stopping sight distance as shown in section 7.5-70, standard details, detail 3.8.06.

(b)

The sight distance for crest and sag vertical curves is the distance measured along the roadway from a driver's eye three and one-half (3.5) feet above the pavement to an object six (6) inches high at the intersection as shown in section 7.5-70, standard details, detail 3.8.06.

(c)

The sight distance for horizontal curves is determined by the line of sight available two (2.0) feet above the road surface. The sight distance is measured along the existing edge of pavement beginning at the centerline of the proposed entrance and ending where the line of sight intersects it. The line of sight is the projected line of visibility beginning at the entrance centerline and tangent to an obstruction two (2.0) feet above the road surface. Examples of obstructions are vegetation, ground cover, signs, existing topography, etc. (See section 7.5-70, standard details, detail 3.8.07.)

(5)

Curves:

(a)

Vertical: The length of vertical cures, both crest and sag, shall be based upon current AASHTO standards.

(b)

Horizontal: Streets shall be designed to have a centerline radius of curvature of no less than one hundred (100) feet. Proposed minor collector streets shall have a minimum three hundred (300) centerline radius of curvature. All other streets horizontal curvature shall be designed according to AASHTO standards.

Tangent distance between reverse curves shall be as follows:

Major collectors:	300 feet
Minor collectors:	200 feet

 

(6)

Street cross-section:

(a)

Street cross-sections shall be as shown in section 7.5-70, standard details, detail 3.8.01.

(b)

Curb and gutter shall be as shown in section 7.5-70, standard details, detail 3.8.09.

(c)

Cul-de-sac radius shall be as shown in section 7.5-70, standard details, detail 3.8.02 for residential applications and 3.8.03 for commercial applications.

(7)

Street paving: Pavement thickness for streets shall be as specified in section 7.570, standard details, detail 3.8.01

(a)

"GAB" refers to graded aggregate base as specified in the Georgia DOT in Standard Specifications Section 815.

(b)

"Type B" refers to Type B Asphalt concrete as specified in the Georgia DOT in Standard Specifications Section 828.

(c)

"Type E" refers to Type E Asphalt concrete as specified in the Georgia DOT in Standard Specifications Section 828.

(d)

"Type F" refers to Type F Asphalt concrete as specified in the Georgia DOT in Standard Specifications Section 828.

(e)

All local commercial/industrial and minor collector commercial/industrial streets shall have the same paving section as the major collector street type.

(8)

Dam supporting road: No city street shall be designed to cross an existing or proposed dam that is regulated by the Safe Dams Act.

(9)

Curb and gutter: Curb and gutter shall be required on all paved streets. (See section 7.5-70, standard details, detail 3.8.09.)

(10)

Sidewalks:

(a)

Sidewalks shall be required on at least one (1) side of all new streets in residential developments and are required along property frontage of all new developments on existing streets.

(b)

Sidewalks shall be a minimum of five (5) feet in width and shall be constructed in accordance with section 7.5-70, standard details, detail 3.8.15 and located as shown in detail 3.8.14.

(c)

Sidewalks shall be backfilled and landscaped.

(d)

Sidewalks shall include handicap ramps at all street intersections to meet the Americans with Disabilities Act (ADA) requirements. See section 7.5-70, standard details, detail 3.8.16a, 3.8.16b, 3.8.16c and 3.8.16d.

(11)

Traffic signs: The design professional shall show the location of all required traffic signs. The developer shall furnish and install all street signage in the project. Unless otherwise noted, design of traffic signs shall conform to the Manual on Uniform Traffic Control Devices (MUTCD), Latest Edition, published by the United States Government Printing Office.

(12)

Utility locations: All utility locations shall correspond to the typical layout shown in section 7.5-30, standard details, details 3.8.12 and 3.8.13.

(Ord. No. 25-07, § 1, 6-7-07)