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Total length 22 miles.
The highway is known as Woodward Avenue for the entire length. Woodward Avenue continues past the northern terminus of M-1 into downtown Pontiac.
M-1/Woodward Avenue was designated a Michigan Heritage Route by the Michigan Department of Transportation-Design Division in July 1999 and as a National Scenic Byway by FHWA National Scenic Byways Program on June 13, 2002.