Illinois Interstate 55
1970 specification guide sign shield. Manufactured between 1970 and 1975.
At one point, this green sign had a US-66 shield, as well as the I-55.
Photo by Jeff Royston, 1985.
1970 specification guide sign shield. Manufactured between 1970 and 1975.
At one point, this green sign had a US-66 shield, as well as the I-55.
Photo by Jeff Royston, 1985.