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M-30 (Michigan highway)
M-30 is a state trunkline highway in the U.S. state of Michigan that runs in a north–south direction from the Midland area to West Branch. The highway runs through rural parts of three counties in the Lower Peninsula. The southern end runs along the Michigan Meridian and parallel to the Tittabawassee River. Prior to 1962, M-30's southern terminus ended at a junction with M-46 in Merrill. Since then, the segment south of US Highway 10 (US 10) was returned to local control and decommissioned. In May 2009, M-30 was extended southerly from US 10 to M-20, restoring some of the highway decommissioned in the 1960s to M-30.
==Route description==
M-30 is a rural, two-lane highway. M-30 follows Meridian Road starting at an intersection with M-20 (Isabella Road) outside of Midland. From this intersection, the highway runs north along the Michigan Meridian through forest lands to a crossing of the Tittabawassee River near Sanford. M-30 passes through the community and crosses the US 10 freeway near the location where the latter crosses a narrow section of Sanford Lake. The road continues north running parallel to the lake along the meridian to a point near Edenville. There, the highway turns westerly along Curtis Road and then back northerly on Midland Road to a crossing of the Tittabawassee and Wixom Lake.〔〔
Past the river and lake crossings, M-30 angles to the northeast to return to the Michigan Meridian. The area adjacent to the lake is farm land, but continuing north, the highway returns to the woodlands of the Au Sable State Forest. M-30 intersects M-61 at Wooden Shoe Village near Smallwood Lake. The highway continues to parallel the Tittabawassee River, crossing several of its smaller tributaries, until a point south of the Gladwin–Ogemaw County county line. The trunkline passes through a small unnamed, unincorporated community northwest of Hockaday near Indian and Elk lakes as the road turns to the northeast between the lakes in the area. M-30 crosses the county line near Edwards and continues northward. The highway turns to the northeast as it approaches West Branch, crossing under I-75 without an interchange. M-30 ends at Business Loop I-75/M-55 on the west side of West Branch.
The Michigan Department of Transportation (MDOT) maintains M-30 like all other parts of the state trunkline highway system. As a part of these responsibilities, the department tracks the volume of traffic using its roads in surveys using a metric called average annual daily traffic (AADT). MDOT calculates the traffic level for a segment of roadway for any average day of the year in these surveys. For 2009, the highest traffic levels were observed on the section north of US 10 at 7,579 vehicles per day. The lowest AADT levels were the 2,952 vehicles between the M-61 junction and the Gladwin–Ogemaw county line. The survey did not include the section south of US 10. No segment has been listed as part of the National Highway System, a network of roads important to the nation's economy, defense, and mobility.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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