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Thresholds Measured as Number of Average Daily Trips (ADT)

Arterial Unit NOT Designated As Ultimate Capacity

Arterial Unit Designated As Ultimate Capacity

Number of Lanes

Rural

Urban

Rural

Urban

2

4,000

7,000

18,000

22,000

3

5,000

9,000

27,000

33,000

4

7,000

12,000

36,000

44,000

5

n/a

15,000

45,000

55,000

6

n/a

16,000

54,000

66,000

7

n/a

21,000

63,000

77,000

(Added by Amended Ord. 05-092, Dec. 21, 2005, Eff date Feb. 1, 2006; Amended by Amended Ord. 09-004, Mar. 4, 2009, Eff date Mar. 27, 2009).