Table 3-3. Design Values for Local Roadway Features Urban Local Roads Local collector Local Road Local Local Road Urban (c) Urban (c) collector Rural Rural Lane Width 13 ft. 11 ft. 10 ft. 8 ft. (a)(b)(f) Sidewalk, both sides or 5 ft. 5 ft. 4 ft. ft. 3 (e) (e) (d) (d) Shoulder Ditch Slope (in-slope) N/A N/A 2H:1V 2H:1V For curbed, distance from face of curb to road centerline. For (c) Curbed section is appropriate for urban setting. shouldered, distance from inside edge of shoulder to road (d) When guardrail is necessary, provide 2 feet of widening or longer centerline. posts to ensure lateral support. Residential areas where on street parking is required, provide 7 (e) When sidewalk is required as a condition of development additional feet. approval. (f) Additional width may be necessary at curves 3.7.1 Cul-de-sacs Whenever a cul-de-sac dead end road extends more than 150 feet measured from the centerline of the intersecting road to the farthest extent of surfaced traveled way, a widened "bulb" shall be constructed as follows: Minimum public right of way diameter across the bulb section shall be 100 feet. The right of way diameter may be reduced, provided utilities and necessary stormwater management are accommodated on permanent easements within the development. Minimum diameter of surfacing across the bulb shall be 80 feet of paving for a curb-type road and 80 feet total for a shoulder- type road, to include 74 feet of paving and 3-foot shoulders with compacted crushed surfacing material. Public roads in areas zoned Commercial or Industrial shall have a minimum roadway diameter of 100 feet. When on-street parking is required an additional 16 feet of paving is required. Cul-de-sac Island: An optional feature for a cul-de-sac, an island, if provided, shall have a minimum diameter of 20 feet and
Table 3-3. Design Values for Local Roadway Features Local Roads Urban Local collector Urban (c) Local Road Urban (c) Local collector Rural Local Road Rural Lane Width (a)(b)(f) 13 ft. 11 ft. 10 ft. 8 ft. Sidewalk, both sides or Shoulder 5 ft. (e) 5 ft. (e) 4 ft. (d) ft. (d) 3 Ditch Slope (in-slope) N/A N/A 2H:1V 2H:1V For curbed, distance from face of curb to road centerline. For shouldered, distance from inside edge of shoulder to road centerline. Residential areas where on street parking is required, provide 7 additional feet. (c) Curbed section is appropriate for urban setting. (d) When guardrail is necessary, provide 2 feet of widening or longer posts to ensure lateral support. (e) When sidewalk is required as a condition of development approval. (f) Additional width may be necessary at curves 3.7.1 Cul-de-sacs Whenever a cul-de-sac dead end road extends more than 150 feet measured from the centerline of the intersecting road to the farthest extent of surfaced traveled way, a widened "bulb" shall be constructed as follows: Minimum public right of way diameter across the bulb section shall be 100 feet. The right of way diameter may be reduced, provided utilities and necessary stormwater management are accommodated on permanent easements within the development. Minimum diameter of surfacing across the bulb shall be 80 feet of paving for a curb-type road and 80 feet total for a shoulder- type road, to include 74 feet of paving and 3-foot shoulders with compacted crushed surfacing material. Public roads in areas zoned Commercial or Industrial shall have a minimum roadway diameter of 100 feet. When on-street parking is required an additional 16 feet of paving is required. Cul-de-sac Island: An optional feature for a cul-de-sac, an island, if provided, shall have a minimum diameter of 20 feet and
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