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Temporary Interstate Highways

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Title: Temporary Interstate Highways  
Author: World Heritage Encyclopedia
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Subject: Interstate Highway System, Interstate H-1, Puerto Rico Highway 53, Interstate 37, Interstate 15
Publisher: World Heritage Encyclopedia

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 Grandview, 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


  • Temporary Interstates
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