Major Intersections
The entire route is in the District of Columbia.
| Location | Mile | km | Destinations | Notes | |
|---|---|---|---|---|---|
| Columbia Island | 0.00 | 0.00 | I-395 south / US 1 south – Richmond, Alexandria | Continuation into Virginia | |
| Potomac River | 14th Street Bridges (Arland D. WIlliams Jr. Memorial Bridge / George Mason Memorial Bridge) | ||||
| East Potomac Park | 0.50 | 0.80 | I-395 north (Southwest Freeway) – Capitol Hill, Verizon Center, Nationals Park | Northern terminus of concurrency with I-395; US 1 leaves I-395 via Exit 1; Northbound exit and southbound entrance | |
| 0.50 | 0.80 | I-395 south (Rochambeau Memorial Bridge) | To HOV 3+ only; Southbound exit and northbound entrance | ||
| Washington Channel | 14th Street Bridges (US 1 span) | ||||
| Washington | Maine Avenue SW | Interchange; Northbound exit and southbound entrance | |||
| 1.20 | 1.93 | Independence Avenue SW | No left turns except from US 1 south to Independence Avenue east | ||
| 1.50 | 2.41 | US 50 west (Constitution Avenue NW) / 14th Street NW north | Southern terminus of concurrency with US 50 | ||
| 12th Street Expressway / 12th Street NW north | Northern terminus of 12th Street Expressway (one-way northbound) | ||||
| 9th Street Expressway south to I-395 / 9th Street NW north | Northern terminus of 9th Street Expressway (one-way southbound) Southern terminus of one-way pairs (6th Street NW north / 9th Street NW south) |
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| 2.10 | 3.38 | Constitution Avenue SW east | |||
| 2.20 | 3.54 | US 1 Alt. north (Pennsylvania Avenue NW) |
Southern terminus of US 1 Alternate; Access from US 1 north only | ||
| 2.80 | 4.51 | Massachusetts Avenue NW | To Union Station | ||
| 3.00 | 4.83 | US 50 east (New York Avenue NW) | Northern terminus of concurrency with US 50 | ||
| US 1 west / US 50 west (L Street NW) | Northern terminus of one-way pairs | ||||
| 3.60 | 5.79 | US 29 (Rhode Island Avenue NW west / 6th Street NW north) | |||
| 3.80 | 6.12 | Florida Avenue NW | |||
| 7.00 | 11.27 | US 1 north (Rhode Island Avenue) / Eastern Avenue NE – Baltimore | Continuation into Maryland | ||
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Read more about this topic: U.S. Route 1 In The District Of Columbia
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