U.S. Route 1 in the District of Columbia
section of U.S. Numbered Highway in the District of Columbia, United States
U.S. Route 1 (US 1) in Washington, D.C., passes through from Arlington, Virginia, to Mount Rainier, Maryland, predominantly along surface streets. However, it forms a few overlaps with other routes.
Route description
Northbound US 1 and Interstate 395 (I-395) enter the District of Columbia from Virginia on the 14th Street bridges. US 1 traffic exits I-395 from the left to 14th Street, Southwest. After 14th Street crosses the National Mall, US 1 turns right onto Constitution Avenue. It then turns left onto 6th Street, Northwest, and then right onto Rhode Island Avenue. US 1 continues on Rhode Island Avenue through Northeast and into Maryland.
Southbound US 1 enters the District of Columbia from Maryland on Rhode Island Avenue. US 1 turns left onto 6th Street, NW, then right onto L Street, NW, and then left onto 9th Street, NW. It enters the Ninth Street Tunnel and joins I-395, which it follows into Virginia.
Northbound US 1 is concurrent with eastbound US 50 along Constitution Avenue from 14th Street to 6th Street, NW, and along 6th Street from Constitution Avenue to New York Avenue, NW. Southbound US 1 is concurrent with westbound US 50 along L Street between 6th and 9th streets, NW, and along 9th Street from L Street to Constitution Avenue.
“U.S. Route 1 in the District of Columbia” enters the record as section of U.S. Numbered Highway in the District of Columbia, United States. Crown Archives preserves that source wording while asking what Route, District and Columbia can confirm, complicate or overturn.
Why this record matters
“U.S. Route 1 in the District of Columbia” is worth following because a concise public description often conceals a longer documentary argument. Here, Route, District and Columbia provides the most credible route into that argument.
Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Mar 10, 2026. The linked authority identifier is Q718317. 1 of 1 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank.
Architectural summaries often privilege surviving fabric and can understate demolished phases, contested use or displaced communities. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Treat names, boundaries and functions as historically changeable. Maps, plans, inventories and administrative records can clarify what the place meant at different dates.
- Historic place names
- Jurisdictional context
- Routes into maps and plans
Contemporary maps, plans, listed-building records, estate papers and the responsible local or national archive.
Three-step research path
- Establish the record: confirm the title “U.S. Route 1 in the District of Columbia”, its source revision and the description used here.
- Expand the search: follow U.S. Route 1 in the District of Columbia primary sources, U.S. Route 1 in the District of Columbia archive and Route 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 “U.S. Route 1 in the District of Columbia”?
- Which earlier names or jurisdictions may reveal additional records?
- What physical evidence or contemporary plan supports the description?
Search terms from this dossier
This entry incorporates text from “U.S. Route 1 in the District of Columbia” 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.