(A) New perimeter streets. Street systems in new subdivisions shall be laid out so as to eliminate or avoid new perimeter half-streets. Where an existing half-street is adjacent to a new subdivision, the other half of the street shall be improved and dedicated by the subdivider. The Planning Commission may authorize a new perimeter street where the subdivider improves and dedicates the entire required street right-of-way width within his or her own subdivision boundaries.
(B) Widening and realignment of existing roads. Where a subdivision borders an existing narrow road or when the master plan, official map, or zoning setback regulations indicate plans for realignment or widening a road that would require use of some of the land in the subdivision, the applicant shall be required to improve and dedicate, at his or her expense, such areas for widening or realignment of such roads. Such frontage roads and streets shall be improved and dedicated by the applicant at his or her own expense to the full width as required by these subdivision regulations. Land reserved for any road purposes may not be counted in satisfying yard or area requirements of the Zoning Code, whether the land is to be dedicated to the municipality in fee simple or an easement is granted to the local government.
Design Standards for Roads | ||||
Development Density | ||||
Residential | Non-residential | |||
Improvement | Low | Medium | High | Business Industrial/ Commercial |
Design Standards for Roads | ||||
Development Density | ||||
Residential | Non-residential | |||
Improvement | Low | Medium | High | Business Industrial/ Commercial |
Min. Width R.O.W. (FT.) | ||||
Local Road | 66 | 66 | 66 | 66 |
Collector Road | 66 | 66 | 66 | 66 |
Secondary Arterial | 66 | 66 | 86 | 86 |
Primary Arterial | 86 | 100 | 120 | 120 |
Min. Width Traveled Route | ||||
Local Road | 26W/S | 30W/C | 32W/C | 30W/C |
Collector Road | 28W/S | 32W/C | 34W/C | 40W/C |
Secondary Arterial | 30W/S | 40W/C | 44W/C | 44W/C |
Primary Arterial | 44W/S | 48W/C | 48W/C | 48W/C |
Max. Grade % | ||||
Local Road | 10% | 10% | 8% | 6% |
Collector Road | 8% | 8% | 8% | 6% |
Secondary Arterial | 6% | 6% | 6% | 5% |
Primary Arterial | 6% | 6% | 6% | 5% |
Min. Grade % | 1% | 1% | 1% | 1% |
Local Road | ||||
Collector Road | ||||
Secondary Arterial | ||||
Primary Arterial | ||||
Min. Radius of Curve (FT.) | ||||
Local Road | 100 | 100 | 100 | 200 |
Collector Road | 100 | 100 | 100 | 200 |
Secondary Arterial | 300 | 300 | 300 | 400 |
Primary Arterial | 500 | 500 | 500 | 500 |
NOTE: W/S = with shoulders (roll-type curb) W/C = with curb | ||||
Min. Length of Vertical Curves | ||||
Local Road | 100 ft. but not less than 20 ft. for each algebraic difference in grade | |||
Collector Road | 100 ft. but not less than 20 ft. for each algebraic difference in grade | |||
Secondary Arterial | 200 ft. but not less than 50 ft. for each 1% | |||
Primary Arterial | 300 ft. but not less than 50 ft. for each algebraic difference in grade | |||
Min. Length of Tangents Between Reverse Curves (FT.) | ||||
Local Road | 100 | 100 | 150 | 200 |
Collector Road | 100 | 100 | 150 | 200 |
Secondary Arterial | 200 | 200 | 250 | 300 |
Primary Arterial | 300 | 300 | 350 | 400 |
Min. Sight Distance (FT.) | ||||
Local Road | 200 | 200 | 200 | 250 |
Collector Road | 200 | 240 | 240 | 250 |
Secondary Arterial | 275 | 275 | 300 | 300 |
Primary Arterial | 275 | 300 | 300 | 400 |
Intersection | Across corners - 75 ft. back of intersection | |||
Min. Turnaround (FT.) | ||||
Cul-de-sac (See figure following this table) | ||||
Local Road | ||||
R.O.W. Diameter | 160 | 160 | 170 | 170 |
Pavement (Outside Dia.) | 124 | 124 | 134 | 134 |
Center Island (Inside Dia.) | 84 | 84 | 82 | 74 |
Design Speed (MPH) | ||||
Local Road | 25 | 25 | 25 | 25 |
Collector Road | 30 | 30 | 30 | 30 |
Secondary Arterial | 40 | 35 | 35 | 35 |
Primary Arterial | 40 | 40 | 40 | 40 |
Min. Length of Cul-de-sac | ||||
Permanent | Seven times average lot width and not exceeding 1,000 ft. in length | |||
Temporary | As approved by the Planning Commission and the City Engineer | |||
Min. Radius (FT.) | ||||
At right-of- way | 25 | 25 | 30 | 30 |
At pavement | 25 | 25 | 30 | 30 |
(Prior Code, § 1246.01)