Happy Birthday to America’s Oldest Subway

On this day 129 years ago, at around 6 a.m., trolley 1752 plunged into a gaping hole in Boston’s Public Garden and became the nation’s first subway car.

More than a hundred passengers crammed onto the Park Street-bound streetcar, a vehicle outfitted to seat only several dozen, according to contemporary reports. Throngs of onlookers cheered the tram along.

“Far down the street the entrance to the great tunnel was marked by a canal of humanity,” the Boston Daily Globe reported. “The passengers aboard the car packed themselves in like sardines, and the black mass, yelling like a jungle of wild animals, dipped down the incline for the underground run to Park St.”

A sepia-toned black-and-white photo of a city street covered in broken timbers and other debris in the aftermath of a major explosion. In the background is a large multi-story masonry building with many broken windows. — On March 4, 1897, about six months before car 1752 would make the country’s inaugural subway journey, a gas explosion devastated the intersection of Tremont and Boylston streets. The “rumble and roar” could be heard from Beacon Hill, according to a contemporary press report on the incident. “Timbers rose in the air. The ground trembled. Smoke floated upward, followed quickly by flashes of fire. The glass in a thousand windows fell outward or inward with a crash.” The blast wrecked vehicles traveling overhead. Ten people died. Leaking gas had pooled in a cavity between the subway tunnel and the street. A few hours after the explosion, Howard Carson, the subway’s lead engineer, assured city transit officials that the tunnel itself escaped injury. Photo courtesy of the Boston Public Library.

A view of a city intersection with a person riding a bike and crowds of pedestrians in the foreground. In the background is a large 19th-century masonry building with a tall "Leasing" banner on its side. — The site of the 1897 subway construction explosion today. Photo by Jaime Moore-Carrillo.

An audacious undertaking, dogged by doubts, touched by tragedy, had proven a stunning success. Even the New York Times remarked (in what reads as a backhanded compliment): “That so conservative an American town should happen to be the pioneer in adopting this is viewed as remarkable.”

The Tremont Street Subway, as it was then known, spanned a little over one mile. The segment that opened for service on Sept. 1, 1897, linked an incline in the Public Garden to Park Street station. Another portal at Pleasant Street opened a few weeks later. The final segment, stretching from Park Street through Haymarket, opened the following year.

A black-and-white image of a subway portal with tracks leading into a tunnel. Old 3- and 4-story brick buildings line the streets above the subway portal. — The Pleasant Street subway portal on Sep. 7, 1897. This subway entry point, located along Tremont Street at present-day Eliot Norton Park, opened a few weeks after the Public Garden-to-Park Street segment. Courtesy of WardMaps LLC.

A view of a playground in a city park surrounded by mature trees. A handful of high-rise buildings are visible in the distance. — Elliot Norton Park, at the corner of Tremont Street and Charles Street, covers the site of the abandoned subway portal today. Photo by Jaime Moore-Carrillo.

As with many great innovations, the subway was born of necessity.

A sprawling network of electric streetcars served Greater Boston in the late 19th century. But congestion in the cramped, awkward thoroughfares of the city center stifled service.

“The extraordinary congestion of the main business streets of Boston makes the electric tramway somewhat of an absurdity in the centre of the city,” Karl Baedeker, a German tour guide author, wrote in an 1893 book.

Government officials weighed a menu of solutions: threading trolleys through alleyways, lifting them into the sky on viaducts, tunneling them underground.

For the core of the city, where standstills reigned, they decided on a subway, a transit method with only a handful of precedents across the world.

A black-and-white image of a major excavation pit in a 19th-century city. In the background is a tall church, and on the right edge are a row of tall multi-story masonry buildings. In the foreground are several horse-drawn carts descending an earth ramp into a massive, deep hole. On the left is a park with mature trees. In the middle distance, in the hole but in front of the church, is a tall wooden bridge spanning the pit. — Subway construction in the Common, circa 1895-1896. Buildings lining Tremont Street can be seen on the right side of the photograph, and Park Street Church stands in the background. Photo courtesy of the Boston Public Library.

A wide walkway in a leafy park in downtown Boston. At the end of the walkway is the steeple of a large church with a taller skyscraper beyond; on the right is a street lined with mid-rise buildings in a mix of architectural styles. — The Boston Common in 2026, looking towards the Park Street station headhouses, above the subterranean Green Line tracks. Photo by Jaime Moore-Carrillo.

The project broke ground in late March 1895. According to one source, laborers hauled about 370,000 cubic yards of earth, poured at least 75,000 cubic yards of concrete, and laid around 11,000 cubic yards of brick. (An Olympic swimming pool can hold about 3,270 cubic yards.)

Sources peg the project’s final bill between around $4 and $5 million — under budget!

The subway’s impacts were swift and sweeping. Traffic on the streets eased. Tens of thousands of riders surged through the system. By 1903, according to one historical analysis, Park Street station handled more than 100,000 riders on a given day.

A black and white photo of a 19th-century city street with several crowded open-sided streetcars, a horse-drawn cart, and a police office directing traffic. In the background are two masonry structures with pitched roofs in a park with mature leafy trees. A sign on the closer structure reads "NORTH-BOUND CARS ENTRANCE" — Headhouses for the newly constructed Boylston Street subway station, three weeks before the subway’s opening in August 1897. The camera, situated at the intersection of Boylston and Tremont Streets, is facing toward the Common. Photo courtesy of the City of Boston Archives.

Two 19th-century masonry structures with pitched roofs in a park with mature leafy trees. Signs on the structures read "BOYLSTON" on a green background. Groups of pedestrians surround the structures on the sidewalk of a city street in the foreground. — The Boylston station headhouses, as seen in late August 2026. Photo by Jaime Moore-Carrillo

A note on sources: StreetsblogMASS largely sourced the quotes, facts, and figures mentioned above from the following books:

Tremont Street Subway: A Century of Public Service by Bradley H. Clarke; O.R. Cummings (1997)
Change at Park Street Under: The Story of Boston’s Subways by Brian J. Cudahy (1972)
The Race Underground: Boston, New York, and the Incredible Rivalry That Built America’s First Subway by Doug Most (2014)
Boston in Transit: Mapping the History of Public Transportation in The Hub (2023)