Sec. 54-280. - Thoroughfare classifications and right-of-way design standards.
a. Within the Gathering Place District, a thoroughfare is defined as a vehicular way incorporating moving lanes and parking lanes within a right-of-way. Thoroughfares shall be designed in context with the Gathering Place District development for which they will be incorporated based on geography, infrastructure, proposed land use and density.
b. Thoroughfares are identified according to the following definitions and hierarchy, which are only applicable within the boundaries of a Gathering Place District.
Type 1 GP Commercial Street | This thoroughfare is, by definition, a Commercial Street, with moderate vehicular speed [20 to 25 mph] and high vehicular and pedestrian traffic volumes. Adjoining uses are mixed, with no residential uses on the street level floors of buildings. Pedestrian-oriented design, including sidewalks and bicycle route designation, is essential on these streets to assure their being safe, convenient, and enjoyable for walking. Walking is a primary function of Thoroughfare Type 1, the Commercial Street.
Type 2 GP Mixed-Use Street | This thoroughfare is labeled a Street and has moderate vehicular speed [20 to 25 mph] and high vehicular and pedestrian traffic volumes. Adjoining uses are mixed. Pedestrian-oriented design, such as sidewalks, is essential on these streets to assure their being safe, convenient, and enjoyable for walking. Walking is a primary function of Type 2 Thoroughfare, the Street.
Type 3 GP Small Street | This is a thoroughfare defined as a Small Street having lower vehicular speeds [20 mph] and moderate volume of both vehicular and pedestrian traffic. Pedestrian-oriented design, such as sidewalks and walking trails, is essential on these streets to assure their being safe, convenient, and enjoyable for walking. Walking is a primary function of the Small Street, Type 3 thoroughfare.
Type 4 GP One Way Street | This is a thoroughfare defined as a One Way Street that carries vehicle traffic in one direction. Pedestrian-oriented design, such as sidewalks and walking trails, is essential on these streets to assure their being safe, convenient, and enjoyable for walking and to fulfill their pedestrian function.
Type 5 GP Road | This is a local, rural and/or suburban thoroughfare defined as a Road and having lower vehicular speeds [20 mph]. It does not include curb/gutter and sidewalks as a Road is intended for uses where off-street paths exist or the streets themselves are used to satisfy the pedestrian travel function. The Road, a Type 5 thoroughfare, incorporates swales for stormwater management. The Type 5 Road thoroughfare is intended for more rural areas and environmentally sensitive areas.
Type 6 GP Alley | This thoroughfare, defined as an Alley, provides rear access to building lots for service access, parking access and utility easements. This Type 6 thoroughfare, functions as both pedestrian and vehicular accessway.
Type 7 GP Avenue | This thoroughfare Type 7, defined as an Avenue, is designed to accommodate predominantly vehicular traffic. Type 7 Avenues can function as connectors between Gathering Place Districts and other urban developments and become collectors upon exiting urban centers.
c. Gathering Place thoroughfares shall be designed according to the minimum design requirements found in Table 12-1.
TABLE 12-1: THOROUGHFARE AND RIGHT-OF-WAY DESIGN REQUIREMENTS
Thoroughfare Type | R-O-W 1 | Travel Lanes 2 | On-street Parking 3 | Curb | Curb Radii 4 | Street Trees (2 sides) 5 | Street tree Spacing 5 | Sidewalks | Bicycle Travel 6
Type 1 GP >Commercial Street | 62′ min. | Two-ways 11′ min. travel lane | 7′ (2 sides) | Vert. | 15′ | Tree Well (24 sq ft) or Planting Strip (5 ft. min. width) | 20′—40′ | 8′ min. (2 sides) | optional
Type 2 GP Mixed-Use Street | 60′ min. | Two-ways 10′ min. travel lane | 7′ (2 sides) | Vert. | 15′ | Tree Well (24 sq ft) or Planting Strip (5 ft. min. width) | 20′—40′ | 8′min. (2 sides) | optional
Type 3 GP Small Street | 55′ min. | Two-ways 10′ min. travel lane | 7′ (1 side) | Vert. | 15′ | Tree Well (24 sq ft) or Planting Strip (4 ft. min. width) | 30′—50′ | 5′min. (2 sides) | optional
Type 4 GP One Way Street | 38′ one-way | One-way 11′ min. travel lane | 7′ (1 side) | Vert. | 15′ | Tree Well (24 sq ft) or Planting Strip (4 ft. min. width) | 30′—50′ | 5′ min. (2 sides) | optional
Type 5 GP Road | 30′+ min. (depending on swale) | Two-ways 10′ min. travel lane | n/a | n/a | n/a | optional | n/a | optional | optional
Type 6 GP Alley | 20′ min. | One-way 12′ min. travel lane | n/a | n/a | 25′ | n/a | n/a | optional | n/a
Type 7 GP Avenue | 46′ min. | Two-ways 10′ min. travel lane | n/a | n/a | 15′ | Planting Strip (5 ft. min. width) | 50′ | n/a | 8′ min. path(2 sides)
1. Right-Of-Way Design Modifications—Right-of-way narrowing devices including, but not limited to, curb extensions, bulbouts, neckdowns and corner bulges shall not be permitted unless approved by the Design Review Committee. Minimum right-of-way width may need to be increased to accommodate utilities. Thoroughfare types may be incorporated into a divided right-of-way design provided that the center median includes street trees and has a minimum width of 10' (width may include curb).
2. Travel Lanes—Travel lane width is designed for low to moderate vehicular speeds (25 MPH or less); higher vehicular speeds may require design modifications. Travel lane width is inclusive of the gutter and up to the face of the curb.
3. On-Street Parking—On-street parking may exist on both sides of Type 1, 2, 3 and 4 streets. On-street parking width is inclusive of the gutter and up to the face of the curb. For thoroughfares with high levels of parking usage and parking turnover (i.e. Type 1 GP Commercial Street) on-street parking lanes shall be increased to 8 feet.
4. Curb Radii—Curb radii are applicable to the face of curb and apply to street intersections, not driveway intersections. Curb radii are designed for low vehicular speeds; higher vehicular speeds may require design modifications. Rear alley intersection may incorporate a "driveway" intersection design rather than a curbed street design if approved by the Department of Public Service.
5. Street Trees—Street tree spacing may vary depending on tree species and development infrastructure. Street tree spacing shall be reviewed and approved by the Department of Parks at construction plan submittal. Street trees shall be installed prior to final plat approval and recordation. Tree wells are encouraged on the Type 1 GP Commercial Street.
6. Bicycle Travel—The Gathering Place District should provide opportunities for bicycle travel. A bicycle path is an independent bicycle way that is to be provided off-street and outside of the vehicular thoroughfare. A bicycle route shall be provided within the vehicular thoroughfare where suitable for shared use of bicycles and vehicles traveling at low speeds and may be indicated with the use of "sharrows". A bicycle lane is a dedicated marked lane with a moderate-speed vehicular thoroughfare. (See Figure 280:2)
d. Thoroughfare Design Flexibility. Gathering Place thoroughfare design standards may be modified to accommodate unique design elements that are project-specific provided that such modifications are made part of the official concept plan and are approved by the Planning Commission. The concept plan must show the proposed layout and corresponding right-of-way cross sections. Modified design standards shall not compromise thoroughfare right-of-way safety or function and must be able to provide appropriate locations for utilities. Modified design standards shall accommodate all required right-of-way components, shall provide appropriate pedestrian and vehicle mobility options and shall be designed to support adjacent future development.
(Ord. No. 2005-603, § 1, 10-18-05; Ord. No. 2007-156, § 1, 8-21-07)
