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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, SR 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-15 |
Sedco 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-15E |
Murrieta to Riverside, California |
I-215 |
1976–1983 |
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 I-69 Bus. |
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 |
Cayce to Dentsville–Woodfield, South Carolina line |
I-26, I-20 and SC 277 |
1986–1996 |
I-80N |
Declo, Idaho to Snowville, Utah |
SR-30, SR-42, and SH-81 |
1960s–1980 |
I-85 |
Lexington to Greensboro, North Carolina |
I-85 Bus. |
1962–1983 |
I-85 |
Charlotte to China Grove, North Carolina |
US 29, US 70 and I-85 Bus. |
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 |
I-196 Bus., US 131 |
1962–1973 |
I-280 |
San Jose to Santa Clara, California |
SR 17 and I-880 |
1970–1975 |
I-505 |
Vacaville to Dunnigan, California |
I-505 |
1964–1979 |
I-680 |
San Jose to Fremont, California |
SR 262, SR 17 and I-880 |
1970–1975 |
References
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Signed |
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Unsigned |
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Lists |
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Other |
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Major Interstates highlighted
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