[Amended 11-6-1996; 11-4-1998]
The standards for street design in the Town of Greenwich are as follows:
Street Types | Commercial | Thoroughfare | Collector | Rural |
|---|---|---|---|---|
Right-of-Way (feet) | 70 | 60 | 50 | 50 |
Pavement Width (feet) | 36 | 24 | 20 | 20 |
Maximum Grade | 4 to 6% | 8% | 8% | 10%, except up to 14% for 200 feet or less |
Minimum Grades | 0.5% | 0.5% | 1% | 1% |
Minimum Sight Distance (alignment) (feet) | 300 | 300 | 250 | 250 |
Minimum Vertical Sight Distance (feet) | 250 | 250 | 100 | 100 |
Intersections | 90° desired for all, but not less than 75° | |||
Minimum Radius at Intersection (feet) | 50 | 40 | 25 | 20 |
Minimum Ditch Depth (inches) | 18 | 18 | 18 | 18 |
Road Culvert | Minimum of 18-inch CMP | |||
Driveway Culvert | Minimum of 12-inch CMP Minimum cover 12 inches | |||
Shoulders (feet) | 6 | 6 | 5 | 5 |
Utility Easement (feet) | 20 | 20 | 20 | 20 |
Minimum Height (feet) | 14 | 12 | 12 | 12 |
Surface | 6-inch blacktop (3-inch base; 2-inch binder; 1-inch blacktop) | 3 1/2-inch blacktop (2 1/2-inch binder; 1-inch blacktop) | 3 1/2-inch blacktop | 3 1/2-inch blacktop or triple surface treatment |
Gravel Base (inches) | 12 | 12 | 12 | 12 |