§ 395-26. Horizontal curves.

Latest version.

A.
Whenever street lines are deflected in excess of 5°, connection shall be made by horizontal curves.

B.
Minimum center-line radii for horizontal curves shall be as follows:

Design Speed

(miles per hour)

Minimum Center-Line Radius

(feet)

20

100

25

150

30

230

35

310

40

430

45

550

50

700

55

850

C.
A straight section of road of at least 100 feet shall be provided between all horizontal curves on collector streets. A straight section of road of at least 200 feet shall be provided between all horizontal curves on arterial streets.

D.
Combinations of the minimum radius and maximum grade are prohibited.

	Design Speed (miles per hour)	Minimum Center-Line Radius (feet)
	20	100
	25	150
	30	230
	35	310
	40	430
	45	550
	50	700
	55	850

                    
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