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Route History for US 1 in Maryland

• In 1926, the route through Maryland was paved but not numbered. The road followed basically the same route US 1 follows today, although the route of what is now called Business US 1 was followed through Bel Air. Just north of Washington, DC, the route followed Baltimore Avenue and Bladensburg Road into Washington.
• By 1928, the route had been numbered as US 1.
• Between 1953 and 1955, the Baltimore Washington Expressway (now called the Gladys Spellman Parkway) was completed, replacing US 1 as a major through route between Baltimore and Washington, DC.
• By 1964, US 1 had been rerouted to its current path just north of Washington, DC.
• Between 1965 and 1970, US 1 was rerouted to its present route around Bel Air.
• By 1974, I 95 was completed between Baltimore and Washington, DC, further reducing US 1's role as a major through route.

Key to Abbreviations for Route Numbers:

• US - US Highway
• I - Interstate Highway (Eisenhower Interstate System)

External websites of interest:

• Additional historical information about US 1 in Maryland can be found on the MD Roads website.

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