Improvement
|
Residential
(feet)
|
Nonresidential, Business or Industrial
(feet)
| |
---|---|---|---|
Minimum width of right-of-way:
| |||
Local street
|
50
|
52
| |
Collector streets
|
60
|
70
| |
Minor arterial
|
70
|
74
| |
Major arterial
|
80
|
80
| |
Minimum width cartway (with concrete curbs):
| |||
Local street
|
30
|
32
| |
Collector street
|
32
|
40
| |
Minor arterial
|
40
|
44
| |
Major arterial
|
48
|
48
|
Maximum Grade
| |||
---|---|---|---|
Type of Street
|
Residential
(percent)
|
Nonresidential, Business or Industrial
(percent)
| |
Local street
|
6
|
4
| |
Collector street
|
5
|
4
| |
Secondary arterial
|
4
|
3
| |
Primary arterial
|
4
|
3
| |
Minimum grade
|
0.5
|
0.5
| |
Service roads and alleys shall have a maximum
grade of 6%. The cross slopes on all streets shall be 2% or less.
|
Minimum Radius of Curve
| |||
---|---|---|---|
Type of Street
|
Residential
(feet)
|
Nonresidential, Business or Industrial
(feet)
| |
Local street
|
250
|
350
| |
Collector street
|
375*
|
375*
| |
Secondary arterial
|
475*
|
475*
| |
Primary arterial
|
700*
|
700*
| |
*Maximum superelevation = 0.06
|
Minimum Length of Vertical Curves
| ||
---|---|---|
Local street
|
100 feet, but not less than 25 feet, for each
1% algebraic difference in grade
| |
Collector street
|
150 feet, but not less than 35 feet, for each
1% algebraic difference in grade
| |
Secondary arterial
|
200 feet, but not less than 50 feet, for each
1% algebraic difference in grade
| |
Primary arterial
|
300 feet, but not less than 100 feet, for each
1% algebraic difference in grade
|
Requirement
|
Residential
|
Nonresidential, Business or Industrial
| ||
---|---|---|---|---|
Minimum length of tangents between reverse curves
(feet):
| ||||
Local street
|
100
|
200
| ||
Collector street
|
240
|
240
| ||
Secondary arterial
|
260
|
260
| ||
Primary arterial
|
300
|
300
| ||
Minimum sight distance (feet):
| ||||
Local street
|
200
|
250
| ||
Collector street
|
240
|
250
| ||
Secondary arterial
|
275
|
300
| ||
Primary arterial
|
350
|
400
| ||
Minimum turnaround (feet):
| ||||
Local street
| ||||
Right-of-way diameter
|
120
|
160
| ||
Pavement
|
100
|
140
| ||
Center island diameter (if required)
|
40
|
60
| ||
Design speed (miles per hour)
| ||||
Local streets
|
30
|
30
| ||
Collector streets
|
35
|
35
| ||
Secondary arterial
|
40
|
40
| ||
Primary arterial
|
50
|
50
| ||
Minimum radius (feet):
| ||||
At right-of-way
|
25
|
30
| ||
At pavement
|
25
|
30
|
Type of Street
|
FABC
|
Stab. Base
|
Soil Aggregate Type II, C1.B
| |
---|---|---|---|---|
Industrial
|
2" FABC-1
|
5"
|
6"
| |
Primary arterial
|
2" FABC-1
|
5"
|
6"
| |
Secondary street
|
2" FABC-1
|
4"
|
6"
| |
Collector street
|
3" FABC-2
|
--
|
8"
| |
Local street
|
2" FABC-1
|
--
|
8"
|
Nature of Road
|
Residential
|
Nonresidential, Business or Industrial
| |
---|---|---|---|
Local road
|
Both sides 4 feet wide
|
Both sides 5 feet wide
| |
Collector road
|
Both sides 4 feet wide
|
Both sides 5 feet wide
| |
Secondary arterial
|
Both sides 4 feet wide
|
Both sides 5 feet wide
| |
Primary arterial
|
Both sides 4 feet wide
|
Both sides 5 feet wide
|
n = 0.015 concrete pipe
| |
n = 0.021 corrugated metal pipe
|
H = 0.21 feet + 0.8 (D2-D1) feet
| |
D1 = Diameter of inlet pipe
| |
D2 = Diameter of outlet pipe
| |
If D1 is larger than D2, head loss = 0.2 feet
|
n = .015 - best concrete-lined ditch
| |
n = .025 - best unlined ditch
| |
n = .03 to .15 - fair to poor natural streams
and watercourses
|
Excavation Material
|
Velocity
(feet per second)
| |
---|---|---|
Fine sand and firm loam
|
2.50 to 3.5
| |
Stiff clay and hardpan
|
3.75 to 6.0
| |
Concrete lined ditch
|
15
|
Storage volume (in cubic feet) =
| |
Project area (in square feet) x difference in
coefficients x total rainfall (in inches)
| |
| |
12 - outflow (in cubic feet)
|
Type of Development
|
Design Factor
(cubic feet per second per acre)
| ||
---|---|---|---|
One- and two-family dwellings
|
.02
| ||
Multiple dwellings:
| |||
One- and two-story
|
.02
| ||
Three- through six-story
|
.03
| ||
Commercial:
| |||
Small stores, offices and miscellaneous business
|
.02
| ||
Shopping centers
|
.02
| ||
High rise
|
To be submitted for approval of Municipal Engineer
| ||
Industrial
|
To be submitted for approval of Municipal Engineer
|
Dwelling Units
|
Minimum Playground and Neighborhood Park
Acreage to be Recommended
| |
---|---|---|
50 to 100
|
2.5 to 3.5
| |
101 to 200
|
3.5 to 5.0
| |
201 to 400
|
5.0 to 7.0
| |
For each additional 100 units
|
1.0 to 2.0
|
Recreational Facilities
|
Number/Unit of Population
| |
---|---|---|
Basketball
|
1 per 1,000
| |
Tennis
|
1 per 2,000
| |
Baseball/softball
| ||
Youth
|
1 per 5,000
| |
Adult
|
1 per 5,000
| |
Football/soccer
|
1 per 5,000
| |
Multicourt
|
1 per 2,000
| |
Tot-lot
|
1 per 200 (15% of total population)
| |
Advanced play
|
1 per 400 (30% of total population)
| |
Picnic areas
|
1 per 5,000
|