Interstate timeline - Department of Transportation

Timeline

Wisconsin Interstate timeline

Year completed	Interstate	Segment	Length - miles	Cost - millions
1958	I-94	Johnson Creek	1
1958	I-94	County SS to Goerke's Corners	7.4
1958-1966	I-94	Madison to Milwaukee County	63	$38
1959	I-94	Hudson to Eau Claire	59	$29
1959	I-90	Janesville to Illinois	15.5	$8.5
1959	I-94	Milwaukee County to Illinois	24	$20
1961	I-90/94	Lake Delton to Madison	52	$33
1961	I-535	Duluth to Superior	2	$16.5
1962	I-90	Madison to Janesville	30	$19
1964	I-90/94	Tomah to Lake Delton	46	$26
1967	I-94	Eau Claire to Black River Falls	56	$40
1968	I-94	Black River Falls to Tomah	28	$15
1969	I-90	La Crosse to Tomah	38	$25
1970-1981	I-43	Cedar Grove to Green Bay
1980's	I-43	Milwaukee to Beloit