Mich. Admin. Code R. 247.243 - Divided commercial driveways

Rule 43. A divided commercial driveway shall have a curbed island separating the entrance drive and the exit drive. The radii forming the edges on this island shall be designed to accommodate the largest vehicle that will normally use the driveway. The minimum area of the island shall be 50 square feet. The design feature dimensions of a divided commercial driveway shall conform to those given in table 4.

Figure for 247.243

TABLE 4

DIVIDED COMMERCIAL DRIVEWAY
Design Features		Curbed Highway		Uncurbed Highway
		Standard	Range	Standard	Range
Intersecting Angle	A	90*	75 to 105*	90*	75 to 105*
Driveway Width	B	48 ft	42 to 90 ft	48 ft	42 to 90 ft
Entering Radius	C	25 ft	5 to SO ft	25 ft	5 to 50 ft
Exiting Radius	D	25 ft	5 to SO ft	20 ft	5 to 50 ft
Entrance Drive Width	K	16 ft	16 to 30 ft	16 ft	16 to 30 ft
Exit Drive Width	L	22 ft	16 to 30 ft	22 ft	1 6 to .10 ft
Island Width	M	10 ft	10 to 30 ft	10 ft	10 to 30 ft
Nose Offset	P	8 ft	2 to 10 ft	14 ft	12 to 17 ft
Island Length	N	35 ft	20 to ISO ft	35 ft	20 to 150 ft
The standard skull he used unless engineering judgment determines than another dimension within the range is more suitable for a particular site or special condition and is appealed by the department

Notes

Mich. Admin. Code R. 247.243

1979 AC