List of highways bypassed by Interstate Highways

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The Interstate Highway System and its numbering as approved June 27, 1958; several of these numbers were modified by 1960

This is a list of highways, mostly U.S. Routes, bypassed by Interstate Highways. Unless otherwise specified, designations are as of ca. 1960, at the time the final Interstate plan was adopted. Interstates marked as "later addition" were added after the early 1960s. Locations and corridors are approximate.

Interstate 2
Interstate 4
Interstate 5 (including Interstate 5E)
Interstate 5W (now Interstate 580, Interstate 80 and Interstate 505)
Interstate 8
Interstate 10
Interstate 12
Interstate 15
Interstate 15W (Idaho) (now Interstate 86)
Interstate 16
Interstate 17
Interstate 19
Interstate 20
Interstate 22
Interstate 24
Interstate 25
Interstate 26
Interstate 27
Interstate 29
Interstate 30
Interstate 35 (including Interstate 35E (Texas))
Interstate 35W (Texas)
Interstate 35W (Kansas) (now Interstate 135)
Interstate 37
Interstate 39
Interstate 40
Interstate 43
Interstate 44
Interstate 45
Interstate 49
Interstate 55
Interstate 57
Interstate 59
Interstate 64
Interstate 65
Interstate 66
Interstate 68
Interstate 69
Interstate 69C
Interstate 69E
Interstate 70 (including Interstate 70N)
Interstate 70S (Pennsylvania)
Interstate 70S (Maryland) (now Interstate 270)
Interstate 71
Interstate 72
Interstate 73
Interstate 74
Interstate 75
Interstate 77
Interstate 78
Interstate 79
Interstate 80
Interstate 80N (Oregon-Idaho-Utah) (now Interstate 84)
Interstate 80S (Colorado) (now Interstate 76)
Interstate 80S (Pennsylvania) (now Interstate 76)
Interstate 580 (California)

The above segment was originally designated as Interstate 5W.

Interstate 81
Interstate 81E (now Interstate 380)
Interstate 82
Interstate 83
Interstate 84
Interstate 84
Interstate 85
Interstate 86
Interstate 87
Interstate 88
Interstate 88
Interstate 89
Interstate 90
Interstate 91
Interstate 93
Interstate 94
Interstate 95
Interstate 195 (Massachusetts)
Interstate 96 (now partly Interstate 196)
Interstate 196 (now Interstate 96)
Interstate 97
Interstate 99
Interstate 238

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