Temporary Interstate Highways

In 1962, during the extensive construction of the Interstate Highway System, Temporary Interstates were marked as a way to connect two completed freeway sections of Interstate highways.

The Temporary Interstates were signed on mostly surface roads that did not meet Interstate standards. The shields were red, white and blue with the word "TEMPORARY" appearing in the top quarter instead of "INTERSTATE." Most of the Temporary Interstates would later be replaced by Business Loops, such as Temporary I-85 southwest of Greensboro, North Carolina (also signed as US 29, US 70 and, at its southern end, US 52).

Future Interstates, such as I-86 in New York, have become more common in recent years. The shields have "FUTURE" in the top quarter, and are placed along what will eventually become the alignments for the mainline.

Temporary Route	Endpoints	Also Signed as/Replaced by	Years Signed
I-5	Stockton to Sacramento, California	SR 99	1973-1980
I-5	Davis to Woodland, California	SR 113	1969-1982
I-5	Williams to Willows, California	I-5	1968-1971
I-5	Grenada to Hilt, California	I-5	1968-1974
I-10	Phoenix to Tonopah, Arizona	Buckeye Road, AZ 85, Old US 80, Salome Highway, 411th Avenue	1975
I-15	San Diego to Miramar, California	I-15	1973-1985
I-15	Escondido to Pala, California	I-15	1973-1986
I-15E	Murrieta to Riverside, California	I-215	1976-1983
I-15	Seduco Hills to Lake Elsinore, California	I-15	1981-1982
I-15	Corona to Mira Loma, California	I-15, SR 31 and Hamner Avenue	1981-1990
I-15	Tremonton to Plymouth, Utah	I-15	Late 1970s-Early 1980s
I-40	Luther to Old Fort, North Carolina	US 70	1964-1973
I-69	Charlotte to Morrice, Michigan	US 27, I-96, US 127, I-496 and Business Loop I-69	1975-1992
I-75	Detroit, Michigan	Lafayette Boulevard	1971-1973
I-75	Bay City to Grayling, Michigan	US 10 and US 27	1962-1974
I-77	Pine Ridge to Dentsville, South Carolina	I-26, I-20 and S.C. Highway 277	1986-1996
I-80N	Snowville, Utah to Declo, Idaho	UT 30, UT 42 and ID 81	1960s-1980
I-85	Lexington to Greensboro, North Carolina	I-85 Business	1962-1983
I-85	China Grove to Charlotte, North Carolina	US 29, US 70 and Business Loop I-85	1963-1974
I-90	Seattle to Bellevue, Washington	I-90	1973-1978
I-95	Washington, D.C. to Baltimore, Maryland	DC 295 and MD 295	1967-1973
I-105	Eugene, Oregon	Washington/Willamette/Jefferson Streets	1968-1973
I-196	Holland to Grandville, Michigan	Business Loop I-196, US 131	1962-1973
I-505	Vacaville to Dunnigan, California	I-505	1964-1979
I-280	San Jose to Santa Clara, California	SR 17 and I-880	1970-1975
I-680	San Jose to Fremont, California	SR 262, SR 17 and I-880	1970-1975

References

Temporary Interstates

Main Interstate Highways

Signed

2
4
5
8
10
12
15
16
17
19
20
22
24
25
26
27
29
30
35
37
39
40
41
43
44
45
49
55
57
59
64
65
66
68
69
70
71
72
73
74
75
76 (W)
76 (E)
77
78
79
80
81
82
83
84 (W)
84 (E)
85
86 (W)
86 (E)
87
88 (W)
88 (E)
89
90
91
93
94
95
96
97
99
H-1
H-2
H-3

Unsigned

Lists

Primary	Main Suffixed Temporary Future

Auxiliary	Main

Other	Standards Business Bypassed Gaps Tolled

Major Interstates highlighted

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