Table 3.3 (Subdivision Private Road Standards)
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Requirements |
Private Road Classification |
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Subdivision Collector |
Subdivision Local |
Limited Local |
Private Driveway Easement |
Alley |
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Number of Residential Lots Served |
50+ |
6 to 49 |
1-5 |
1-5 |
1-49 |
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Right-of-Way Width (ft.) |
Roads (feet) |
50 |
45 |
30 |
- |
20 |
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Cul-de-sac (radius) |
- |
50 |
50 |
- |
- |
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Easement Width (ft.) |
- |
- |
- |
30 |
- |
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Sight Distance on Vertical Curves (ft.) |
150 |
110 |
110 |
- |
- |
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Center Line Curve Radius (ft.) – See section F. below |
90 |
90 |
90 |
- |
- |
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Maximum Grade % |
Stone Only |
12 |
15 |
15 |
- |
- |
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Paved Surface |
16 |
18 |
18 |
- |
- |
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Minimum Travelway Width (ft.) (two-way road) |
18 |
16 |
16 |
- |
12 |
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Minimum Travelway Width (ft.) (one-way road) |
12 |
12 |
12 |
- |
12 |
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Shoulder Width (each side, two-way road) (ft.) |
6 |
4 |
2 |
- |
- |
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Shoulder Width (each side, one-way road) (ft.) |
2 |
2 |
2 |
- |
- |
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Stone Base (ABC) Compacted (in.) |
8 |
6 |
6 |
- |
- |
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Asphalt |
(1½ of S-9.5B or BST) |
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Cut and Fill Slope |
2:1 |
1.5:1 |
1.5:1 |
- |
- |
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Ditch Slope |
4:1 |
3:1 |
3:1 |
- |
- |
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Vertical Clearance (ft.) |
13.5 |
13.5 |
13.5 |
13.5 |
13.5 |
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