I-55 was originally constructed in the 1970s, to extend a section of Route 66 between I-294 and Gardner which had been converted into a freeway and had Interstate signage installed in 1960.
I-55 была изначально построена в 1970-х для расширения части US 66 между I-294 и Гарднером (Иллинойс), преобразованной в 1960 году в шоссе и получивший указатели Interstate.