Design Standards and Improvement Specifications
Strength Type of Concrete | (pounds per square inch) |
|---|---|
Class A | 5,500 |
Class B | 4,500 |
Class C | 3,500 |
Class D | 3,000 |
Total Parking Spaces in Parking Area | Minimum Number of Spaces to Be Provided for Physically Handicapped |
|---|---|
up to 25 | 1 (van accessible) |
26 to 50 | 2 (1 shall be van accessible) |
51 to 75 | 3 (1 shall be van accessible) |
76 to 100 | 4 (1 shall be van accessible) |
over 100 | 4 plus 1 for each 50 over 100 spaces (2 van accessible) |
Figure 9 | |||
|---|---|---|---|
Schedule of Street Design Standards | |||
Classification | |||
Local | Collector Streets | Arterial Highways | |
Normal Traffic Capacity (ADT) | 400 | 3,000 | 10,000 |
Minimum Right-of-Way Width | 50 feet | 60 feet | 100 feet |
Minimum Paving Width: | |||
Two Way | 30 feet | 40 feet | 0 feet |
One Way | 22 feet | — | — |
Shoulder (or Parking Area Width) (1) Sidewalks: | — | — | 2 @ 8 feet |
Width | 4 feet | 4 feet | 4 feet |
Setback (from face of curb) | 3 feet | 3 feet | 7 feet |
Design Speed (MPII) (3) | 40 | 50 | 60 |
Minimum Radius of Horizontal Curvature At Centerline | 150 feet | 500 feet | 2,000 feet |
Minimum Tangent Between Reverse Curb | 100 feet | 200 feet | 600 feet (4) |
Maximum Longitudinal Grade | 8% | 8% | 4% |
Minimum Longitudinal Grade Desirable Absolute | 0.75% | 0.75% | 0.75% |
Maximum Longitudinal Grade for 200 feet from Each side of an intersection | 3.5% | 3.00% | — |
Minimum Curb Return Radius at Intersection (2) | 25 feet | 35 feet | 45 feet |
Vertical Curve (5) | |||
Crest: Minimum Length equals 100 feet Based on stopping sight distance at design speed | |||
Sag: Minimum Length equals 100 feet-Based on headlight illumination & stopping sight distance at design speed. | |||
Maximum Superelevation Not Required | |||
Pavement Cross Slope Minimum | 3.00% (7) | 3.33% (8) | 1.50%(8) |
Curb Face Required (6) | 6" | 6" | 8" |
Minimum Property Line Corner Radius (2) | 15' | 15' | 30' |
NOTES: | |
|---|---|
(1) | Shoulders or parking areas in required as indicates. |
(2) | When dissimilar streets intersect the large radius will be used. |
(3) | For sight distance and vertical curve calculation only. |
(4) | Or as required to run out superelevation (1% per sec. of travel at design speed). |
(5) | Not required if algebraic difference of intersecting grades does not exceed 1. |
(6) | Except in superelevation areas. |
(7) | 6" crown. |
(8) | 8" crown. |
Design Standards and Improvement Specifications
Strength Type of Concrete | (pounds per square inch) |
|---|---|
Class A | 5,500 |
Class B | 4,500 |
Class C | 3,500 |
Class D | 3,000 |
Total Parking Spaces in Parking Area | Minimum Number of Spaces to Be Provided for Physically Handicapped |
|---|---|
up to 25 | 1 (van accessible) |
26 to 50 | 2 (1 shall be van accessible) |
51 to 75 | 3 (1 shall be van accessible) |
76 to 100 | 4 (1 shall be van accessible) |
over 100 | 4 plus 1 for each 50 over 100 spaces (2 van accessible) |
Figure 9 | |||
|---|---|---|---|
Schedule of Street Design Standards | |||
Classification | |||
Local | Collector Streets | Arterial Highways | |
Normal Traffic Capacity (ADT) | 400 | 3,000 | 10,000 |
Minimum Right-of-Way Width | 50 feet | 60 feet | 100 feet |
Minimum Paving Width: | |||
Two Way | 30 feet | 40 feet | 0 feet |
One Way | 22 feet | — | — |
Shoulder (or Parking Area Width) (1) Sidewalks: | — | — | 2 @ 8 feet |
Width | 4 feet | 4 feet | 4 feet |
Setback (from face of curb) | 3 feet | 3 feet | 7 feet |
Design Speed (MPII) (3) | 40 | 50 | 60 |
Minimum Radius of Horizontal Curvature At Centerline | 150 feet | 500 feet | 2,000 feet |
Minimum Tangent Between Reverse Curb | 100 feet | 200 feet | 600 feet (4) |
Maximum Longitudinal Grade | 8% | 8% | 4% |
Minimum Longitudinal Grade Desirable Absolute | 0.75% | 0.75% | 0.75% |
Maximum Longitudinal Grade for 200 feet from Each side of an intersection | 3.5% | 3.00% | — |
Minimum Curb Return Radius at Intersection (2) | 25 feet | 35 feet | 45 feet |
Vertical Curve (5) | |||
Crest: Minimum Length equals 100 feet Based on stopping sight distance at design speed | |||
Sag: Minimum Length equals 100 feet-Based on headlight illumination & stopping sight distance at design speed. | |||
Maximum Superelevation Not Required | |||
Pavement Cross Slope Minimum | 3.00% (7) | 3.33% (8) | 1.50%(8) |
Curb Face Required (6) | 6" | 6" | 8" |
Minimum Property Line Corner Radius (2) | 15' | 15' | 30' |
NOTES: | |
|---|---|
(1) | Shoulders or parking areas in required as indicates. |
(2) | When dissimilar streets intersect the large radius will be used. |
(3) | For sight distance and vertical curve calculation only. |
(4) | Or as required to run out superelevation (1% per sec. of travel at design speed). |
(5) | Not required if algebraic difference of intersecting grades does not exceed 1. |
(6) | Except in superelevation areas. |
(7) | 6" crown. |
(8) | 8" crown. |