The Susquehanna River flows between Cecil and Harford Counties. U.S. 1 connects the two across Conowingo Dam. Photo taken 05/29/05.

U.S. 1 was the original highway linking Washington, D.C., Baltimore, and Philadelphia, Pennsylvania. The US highway was superseded in importance with the completion of Interstate 95 and the Northeastern Expressway. However outside of the urban areas, the US Highway still plays a vital role in movements throughout Cecil and Harford Counties.

U.S. 1 Maryland Highway Guides

U.S. 1 Cecil County Average Annual Traffic (AADT)

  • 8,925 - Conowingo Dam
  • 11,025 - Between U.S. 222 and Maryland 273 (Rising Sun Road)
  • 4,125 - Between Maryland 273 (Rising Sun Road) and Maryland 276
  • 7,625 - Between Maryland 276 and the Pennsylvania state line

Source: 2003 Highway Location Reference file for Cecil County (MDSHA)

U.S. 1 Alternate

U.S. 1 Alternate bypasses Arbutus between Halethorpe and Morrell Park in southwest Baltimore. The US highway utilizes Washington Boulevard and Caton Avenue along the 3.92-mile alignment.1 Interchanges exists along the route with Interstate 95 and Interstate 695 (Baltimore Beltway).

U.S. 1 Alternate north
U.S. 1 Alternate continues Washington Boulevard northward from U.S. 1 (Southwestern Boulevard) through Halethorpe. The first northbound reassurance marker lies at the wye interchange with Southwestern Boulevard. U.S. 1 northbound traffic passes underneath Washington Boulevard en route to Arbutus. Photo taken 10/10/04.
Situated within the Baltimore suburb of Halethorpe is the signalized intersection with Ridge and Northeast Avenues. Ridge Avenue continues east from Francis Avenue in Arbutus to Washington Boulevard. Northeast Avenue ties into U.S. 1 Alternate from residential areas to the south. Photo taken 10/10/04.
U.S. 1 Alternate (Washington Boulevard) divided as it nears the intersection with Sulphur Spring Road. The parclo interchange with Interstate 695 (Exit 10) lies just beyond the signalized intersection. Photo taken 10/10/04.
Northbound at Sulphur Spring Road and Old Washington Boulevard. Sulphur Spring Road comprises a surface arterial west to Arbutus and U.S. 1 (Southwestern Boulevard). Old Washington Boulevard loops east of U.S. 1 Alternate between Monumental Avenue and here. Connections with Benson Avenue via Sulphur Spring Road serve the Violetville neighborhood of south Baltimore. Photo taken 10/10/04.
Traffic to Interstate 695 east (outer loop) departs U.S. 1 Alternate (Washington Boulevard) northbound at Exit 10. The Baltimore Beltway travels southeast to Ferndale and the Francis Scott Key Bridge before turning northeast to Dundalk, Essex, and Overlea. Photo taken 10/10/04.
A loop ramp carries motorists onto Interstate 695 west (inner loop) ahead of the Baltimore Beltway interchange with Interstate 95 (Exit 11). Interstate 695 continues north from there to Arbutus, Catonsville, and Interstate 70. Photo taken 10/10/04.
U.S. 1 Alternate south
U.S. 1 Alternate follows Caton Avenue south from its beginning at the intersection of Caton and Wilkens Avenues in south Baltimore. The US highway quickly meets I-95 at a cloverleaf interchange. A loop ramp carries U.S. 1 Alternate southbound drivers onto Interstate 95 north for Downtown Baltimore and the John F. Kennedy Memorial Highway to Wilmington, Delaware. Photo taken 10/10/04.
Caton Avenue leaves its interchange with Interstate 95 and intersects Georgetown Road. Georgetown Road ventures south from Bernard Drive to Joh Avenue near the Baltimore city line. Photo taken 10/10/04.
U.S. 1 splits with Caton Avneue via Hammonds Ferry Road briefly ahead of its turn onto Washington Boulevard. Hammonds Ferry Road exits the city en route to Lansdowne and Patapsco Valley State Park as U.S. 1 Alternate turns southwest via Washington Boulevard to Halethorpe and the return to U.S. 1. Photo taken 10/10/04.
Caton Avenue transitions into Patapsco Avenue beyond the U.S. 1 Alternate split via Hammonds Ferry Road. Patapso Avenue intersects Washington Boulevard adjacent to the U.S. 1 Alternate southerly turn adjacent to the Baltimore County line. Washington Boulevard continues northeast from here into the Morrell Park and Carroll Park communities en route to downtown. Photo taken 10/10/04.
U.S. 1 scenes
The Conowingo Dam, which carries U.S. 1 over the Susquehanna River, is visible in the distance over the reservoir created by the hydroelectric facility. View looks from a nearby hiking trail north of Conowingo Road. Photo taken 06/17/00.
Fulton Avenue doubles as U.S. 1 northbound from Wilkens Avenue to North Avenue in west central Baltimore. Fulton Avenue flows northbound to Edmondson Avenue, where it switches to two way traffic separated by a grassy median. Pictured here is the end of the southbound lanes of Fulton Avenue where traffic must turn onto Edmondson Avenue. Photo taken 06/20/12.
Traffic turning left (west) onto Edmondson Avenue from Fulton Avenue south meets the southbound direction of U.S. 1 (Monroe Street) one block to the west of U.S. 1 north. U.S. 1 proceeds another block south to meet the U.S. 40 freeway at Franklin / Mulberry Streets. Edmondson Avenue becomes a part of U.S. 40, 11 blocks to the west. Photo taken 06/20/12.


  1. MDRoads: U.S. 1

Photo Credits:

06/17/00, 10/10/04, 06/20/12 by AARoads

Connect with:
Interstate 83
Interstate 95
Interstate 495 - Capital Beltway
Interstate 695 - Baltimore Beltway
Interstate 895
U.S. 40
Maryland 45
Maryland 147 - Harford Road
Maryland 222 / Former U.S. 222

Page Updated 07-14-2012.