Mich. Admin. Code R. 247.237

Current through Vol. 24-21, December 1, 2024

Section R. 247.237 - Commercial driveways; right-turn lanes

Rule 37. The applicant shall provide right-turn lanes or tapers as part of a commercial driveway system if the department determines that such right-turn lanes or tapers are required to minimize congestion or hazard on the highway caused by vehicles entering the applicant's driveways. A right-turn lane shall be preceded by a taper. The design feature dimensions of a right-turn lane and taper shall conform to those given in table 1.

Figure for 247.237

TABLE 1

COMMERCIAL RIGHT-TURN LANE AND TAPERS
Design Features		Curbed Highway		Uncurbed Highway
		Standard	Range	Standard	Range
Curb Ending	E	not applicable		10 ft	no range
Right-turn Lane Length	F	as determined by the department
Right-turn Lane width	G	12 ft	10 to 15 ft	12 ft	10 to 15 ft
Entering Taper	H	J 59 ft*	50 to 150ft	1.10 ("1	50 Lo 150 ft
Exiting Taper	J	not applicable		50 ft	50 to 150 ft
*If a right-turn lane is used, the Entering Taper standard shall be 50ft. Without d right-turn tune, the Entering Taper standard shaft be 150 ft.
The standard Aha!! be used unless engineering judgment determines than another dimension within the range is more suitable for a particular site or special condition and is approved by the department.

Mich. Admin. Code R. 247.237

1979 AC