A | AB | B | C |
A | AB | B | C | |
Daily traffic | 4,000 to 20,000 | 750 to 12,000 | 750 to 4,000 | 300 to 750 |
Surface width | 2 - 25 feet | 40 feet | 36 feet | 30 feet |
Shoulders | 10 feet | 8 feet | 4 feet | 0 |
Maximum grade | 4% | 6% | 6% | 8% |
Minimum grade | 0.5% | 0.5% | 0.8% | 1% |
Maximum crown | 1/8 inch to 1.0 foot | 1/4 inch to 1.0 foot | 1/4 inch to 1.0 foot | 1/2 inch to 1.0 foot |
Minimum right-of-way | 100 feet | 80 feet | 60 feet | 50 feet |
('66 Code, § 63-14)