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-73 and I-74 in North Carolina, 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 Hilts, 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 (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 |