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170.15 DESIGN STANDARDS FOR R1C AND DURE DISTRICTS (Optional Residential Zoning Districts).
The design standards for the R1C and DURE Zoning Districts are reflective of the fact that these districts require special parameters for infrastructure design, in addition to or in lieu of the otherwise conventional standards required in this chapter.
1.   Alley Required. In accordance with the Zoning Ordinance, Dutch Residential District alleys are required for new developments in the R1C and DURE Districts except where specifically exempted therein.
2.   Street and Alley Design Standards. Street and alley design for subdivisions in the R1C and DURE Districts shall be in accordance with the following Table.
 
Total Lanes
Parking Lanes
Pavement Width
Shoulders
R.O.W.
Collector
2
0
27 feet
4 feet grassed
60 feet
Local Access
3
1
25 feet
4 feet grassed
50 feet
Lanes or Alleys
1
0
16 feet
2 feet grassed
20 feet
Shared Drives
1
0
12 feet
3 feet grassed
N/A
 
   A.   Rectilinear Streets. Rectilinear street layouts are required. However, curvilinear layouts may be permitted when designed with street interconnections and terminal open space or public space vistas provided that at least 50% of the streets are rectilinear.
   B.   Cul-de-sacs Prohibited. Cul-de-sacs are expressly prohibited in R1C and DURE Districts.
   C.   Block Length and Pedestrian Connections. Streets shall be designed to have maximum lengths of 600 feet between four-way intersections and maximum lengths of 600 feet before terminating at three-way “T” intersections or angling off in a diagonal direction. In no case, shall a block be greater than 600 feet long.
   D.   Streets shall be laid out to promote pedestrian circulation and ease of access from all points in the subdivision and to any adjacent mixed use, commercial, civic or institutional areas and any adjacent pedestrian/bike trails.
3.   Streetscape Standards.
   A.   Sidewalks and Crosswalks. Sidewalks and crosswalks constructed of brick pavers or rectangular flagstones are highly encouraged. Sidewalks and crosswalks shall be designed in accordance with City standards.
   B.   Pedestrian Lighting. Pedestrian lighting shall be required. The developer shall install light fixtures consistent with good engineering practices and with approval of the Electric Department. Light fixture design shall be consistent with pedestrian lighting generally found elsewhere in the City.
4.   Utility Service Locations. Utility service locations for R1C and DURE Districts shall be in accordance with R1C and DURE District Utility Service Locations schematic available at Public Works.