The Washington Metro opened its doors to the public, unveiling its first operational section, which spanned 4.5 miles and connected the National Gallery of Art to Rhode Island Avenue. This momentous event was the culmination of efforts that began in the 1960s, driven by the need to provide efficient transportation to a rapidly growing urban population and to combat rising traffic congestion. The Metro system was designed to facilitate easy access to Washington D.C. and its suburbs, featuring a modern design that included underground tunnels and elevated tracks. The opening of this initial segment showcased the Metro's potential and its anticipated role in reshaping urban mobility in the area.

The opening ceremony was attended by notable figures, including then-Washington Mayor Walter Washington and officials from the Washington Metropolitan Area Transit Authority (WMATA). Public enthusiasm was palpable as the first passengers boarded the trains, eager to experience the new travel option. The inaugural day also featured a special fare of 25 cents, an incentive to entice locals to try the service. This new mode of transportation heralded a new era for public transit in the region and would ultimately expand into one of the largest metro systems in the United States, connecting various neighborhoods, business districts, and nearby suburbs.

Following the launch, the Metro system underwent several expansions, serving millions of passengers annually. It became a model for urban transit systems across the country and contributed significantly to the easing of vehicular traffic in Washington D.C. Over the years, the Metro has also implemented various upgrades and technologies, reflecting changes in transit needs and advancing infrastructure standards.