Illinois Route 13
state highway in Illinois, United States
Illinois Route 13 (IL 13) is a major east–west state route in southern Illinois. Illinois 13 has its western terminus at Cahokia Heights at Illinois Route 157 and its eastern terminus at the Kentucky state line and the Ohio River, at Kentucky Route 56. This is a distance of 151.54 miles (243.88 km).
Route description
Cahokia Heights to Carbondale
Illinois 13 runs southeast from the East St. Louis to Carbondale. It is the main highway between these two cities. Starting in Cahokia Heights, IL 13 begins at the IL 157/IL 163 junction. Immediately, IL 13 travels southeast along IL 157. At the next junction, IL 157 branches off northeast. At this point, IL 13 largely parallels the IL 15 expressway.
This brief starts where responsible research should: with the source description of “Illinois Route 13” as state highway in Illinois, United States. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the general reference register because the source frames it as state highway in Illinois, United States. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated May 12, 2026. The linked authority identifier is Q1057078. Authority coordinates are 38.080, -89.382. 2 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Illinois Route 13”, its source revision and the description used here.
- Expand the search: follow Illinois Route 13 primary sources, Illinois Route 13 archive and Illinois research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Illinois Route 13”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Illinois Route 13” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.