a. Dead End Streets
(1) New cul-de-sacs or other dead end streets shall not be permitted.
(2) Existing dead end streets can be maintained, modified, and improved so long as the length of the street is not increased.
c. New streets and alleys shall be dedicated as public right-of-way. Right-of-way can be private only if private stormwater control measures are placed within or underneath the right-of-way. Per paragraph 12.2.2, Other Forms of Access, private streets shall be constructed to public street standards, and all other requirements of this Article shall apply.
2. New Streets
This section provides standards for new streets within Design Districts, and includes a set of street typologies allowed within Design Districts.
a. The requirements of this section apply whenever a new street is proposed for construction.
b. Sidewalk, street tree, and other streetscape amenity requirements found elsewhere in this Article shall apply in addition to following street standards:
c. Construction specifications for street typologies within this section, including intersection specifications, shall be reviewed by the City Transportation Department, City Public Works Department, or NCDOT, as applicable; and approved through the City Public Works Department or NCDOT, as applicable.
d. Curb and gutter shall be measured to back-of-curb pursuant to the specifications of the City Public Works Department.
e. Street Types
(1) Primary Street Type
A two-lane street with on-street parking and bicycle lanes. This street type shall be the default street type throughout the district. The Primary Street Type shall be designed as follows:
(2) Alternate Street Types
(a) Four-Lane Street Type
A four-lane street with a median/turn lane. The Four-Lane Street Type shall be used for streets designated as a major thoroughfare or boulevard in the adopted Comprehensive Transportation Plan, as amended. This street type shall be designed as follows:
(b) Two-Lane Street Type
A two-lane street with limited parking or bike lanes. The Two-Lane Street Type shall be used as a secondary street in the S2 sub-districts. This street type shall be designed as follows:
None; or 8 feet on one side
None. Shared-lane markings shall be provided
(3) Bicycle Lane and Buffers
(a) Buffers shall consist of a raised median or delineated with striping and vertical bollards.
(b) Bicycle lanes shall run behind transit stops.
(c) Bicycle lanes shall be painted green at areas of conflict, such as intersections, bicycle boxes, driveways, and transit stops, as determined by the City Transportation Department.
(1) Bicycle lanes shall be carried through an intersection.
(2) If a right-hand turning lane is needed, the movements of automobiles and bicyclists shall be separated through:
(a) Signalization; or
(2) If no right-turn lane is added, the bicycle facility shall bend in, with the shift occurring at minimum 40 feet before the intersection and ending at minimum 20 feet before the intersection.
(3) At intersections with multiple turning options:
(a) For Primary Street Type: A minimum 10-foot bicycle box shall be installed, at minimum four feet from the pedestrian crosswalk and/or stop bar. A “NO TURN ON RED” sign (MUTCD R10-11) shall be installed. Alternatively, a two-stage turn queue box can be installed in the intersection between the travel lane and bicycle lane.
(b) For Four-Lane Street Type: A two-stage turn queue box shall be installed in the intersection on the side of the bicycle facility away from through traffic.
(1) Landscaping shall be provided for the length of the median except when tapering to accommodate turn lanes. Landscaping shall at a minimum consist of groundcover, tree, and shrub species pursuant to the Durham Landscape Manual for vehicular use areas.
(2) At intersections, a pedestrian/cyclist refuge area shall be provided.
h. Alternative Forms of Compliance
Alternatives to the street design requirements of this section can be approved with a minor special use permit pursuant to Sec. 3.9, Special Use Permit. In addition to the general required findings, the Board of Adjustment shall also find that the alternative design meets or exceeds the multimodal performance and functionality of the street design standards of this section.
3. Existing Streets
Existing streets may remain serving existing development in their current configuration; however, they shall not be extended except in conformance with this Article.
4. Street Names
A street name can be established for a driveway allowed for access for a pedestrian mall under paragraph 16.4.3C, Pedestrian Mall Standards. Establishing a name shall not result in circumventing development requirements for private streets, sidewalks, street trees, or other items.
5. Street Connectivity Requirements
a. Connectivity shall be defined as the continuation of the traditional grid pattern established by the existing road network and creation of new blocks according to paragraph 16.4.4, Block Standards.
c. Any new right-of-way shall continue or connect the existing street grid, unless:
(1) The connection is prohibited by NCDOT; or
d. An existing right-of-way shall not be permanently closed without providing an alternate form of public access that accomplishes the same or similar connectivity.
2. Alleys are not required to have a curb or sidewalk.
4. Alley design shall not result in a dead end or be designed to prevent emergency vehicular movement.
C. Pedestrian Mall Standards
The minimum width of the pedestrian mall shall be 25 feet and the maximum shall be 50 feet.
3. Frontage and Building Types Applicability
4. Clear Zones
A clear zone shall be provided along the length of the pedestrian mall. The clear zone shall be:
a. At least 10 feet wide;
b. Free of obstructions; and
c. Be hardscaped and handicap accessible.
5. Streetscape Amenities
a. Amenities shall be distributed throughout the length of the pedestrian mall.
b. The centerline of the mall shall be used to calculate the minimum amount of each required amenity.
9. Street Names
Street names can be established for pedestrian malls pursuant to paragraph 12.3.2, Street Names. Establishments that open onto the pedestrian mall can have addresses on it when a minimum clear zone of 20 feet in width and 13.5 feet in height is provided to accommodate emergency vehicles.
D. Over-Street Connectors
A major special use permit under Sec 3.9, Special Use Permit, shall be required for all over-street connections over public streets, including but not limited to aerial pedestrian bridges and enclosed building areas. In addition to the requirements of Sec 3.9, Special Use Permit, the applicant shall demonstrate that the project’s relationship to the street and street level objectives and activities has been adequately addressed, and the City Council shall approve the permit only if it finds that:
1. The project will not create negative effects on the surrounding properties; and
E. Temporary Pedestrian Paths and Bus Stops
1. Any existing pedestrian right-of-way that will be inaccessible for more than seven days shall require approval of a pedestrian traffic control plan as per MUTCD standards. Prior to the path becoming inaccessible, the pedestrian traffic control plan shall be submitted to and approved by the Transportation Director or designee, and NCDOT, as applicable, through the construction drawing approval process. Pedestrian traffic control plans shall include new or temporary pedestrian circulation routes and pedestrian protection measures, as appropriate.
2. Any existing bus stop that will be inaccessible for more than seven days, or any existing bus shelter that will be inaccessible for more than thirty days, shall require approval of an alternate bus stop and/or bus shelter location and accessible path to the bus stop and/or bus shelter, as applicable. Prior to the bus stop and/or bus shelter becoming inaccessible, the alternative shall be submitted to and approved by the Transportation Director or designee, NCDOT, and GoTriangle, as applicable, through the construction drawing approval process.