Interstate 880 (Iowa) is not a recognized designation within the United States Interstate Highway System. No federal or state transportation agency, nor any major cartographic or planning publication, lists an Interstate 880 that traverses, begins, or ends in the state of Iowa. Consequently, the term lacks sufficient encyclopedic documentation to provide a detailed description of its route, history, or characteristics.
The numerical identifier “880” would, under the standard Interstate Highway numbering scheme, suggest a spur or auxiliary route of Interstate 80, the primary east‑west corridor that crosses Iowa. Auxiliary interstates are typically numbered with a three‑digit pattern where the last two digits refer to the parent route (e.g., I‑280, I‑480). In this context, a hypothetical I‑880 in Iowa would be expected to serve as a short connector or bypass related to I‑80. However, no such auxiliary route has been officially designated or constructed in Iowa.
Possible usages of the term may arise from:
- Misidentification or typographical errors referring to other interstate designations (e.g., I‑80, I‑880 in California, or I‑680 in Iowa).
- Informal or provisional references in planning documents that were never realized or officially adopted.
- Confusion with state or local highways bearing the number 880 in other jurisdictions.
Given the absence of verifiable sources confirming the existence of an Interstate 880 in Iowa, the term remains unsubstantiated in the encyclopedic record.