The Brookville Liberty Modern Streetcar, also known as the Brookville Liberty, is a streetcar built by Brookville Equipment Corporation since 2012. It is manufactured at Brookville's plant in Pennsylvania.
The Brookville Liberty Modern Streetcar is equipped with onboard battery packs made up of rechargeable lithium-ion batteries, referred to as an onboard energy storage system (OESS), that enable it to operate off-wire. It is the first electric streetcar built in the United States capable of operating off-wire. Brookville president Marion Van Fosson referred to it as "the Prius of the modern streetcar market" due to its hybrid design that allows it to run on either battery power or via pantograph and catenary wires.
The streetcar is a 70% low-floor design that measures in length and can seat 32 passengers; it is also capable of accommodating between 125 and 150 people while fully loaded. Empty, each car weighs . The streetcar rides on Brookville's Soft-Ride trucks on standard-gauge track, and can reach a top speed of . The streetcar's loading gauge varies between , in Dallas, and , in Detroit and Milwaukee.
In 2020, Brookville introduced a new version, named Liberty NXT, with a redesigned carbody among other changes. Production of the first units began that year and delivery of the first completed NXT cars began in 2021, to Tempe Streetcar.
In February 2013, Brookville signed a US$9.4 million contract with Dallas Area Rapid Transit (DART) in Dallas for two Liberty Modern Streetcars to operate its Dallas Streetcar service between Union Station and Oak Cliff, making it the "first-ever American designed and manufactured off-wire capable streetcar to be delivered to a U.S. public transit agency". DART took delivery of its first Brookville streetcar in March 2015.
In June 2015, Brookville signed a contract with M-1 RAIL (later renamed the QLine) in Detroit to sell six Liberty Modern Streetcars for $32 million, its second order for the streetcars. On the Detroit line, the streetcars operate off-wire 60% of the time. The first two cars were scheduled for a late 2016 delivery in anticipation of the line's opening in spring 2017, and were followed by four more deliveries by spring 2017.
In November 2015, Milwaukee signed a four-car, US$18.6-million contract with Brookville for its Lakefront Line of the city's light rail system, "The Hop". This was the third order for the streetcars. Milwaukee's cars feature bicycle racks as well as a climate-control system "adapted to meet the needs of Milwaukee's climate".
Delivery of the streetcars had been expected to begin in mid- to late 2017, with all four cars being delivered by early 2018. The first streetcar vehicles were delivered the week of .
In March 2016, Oklahoma City reached a final agreement with Brookville to purchase five streetcars, with an option for a sixth, at a cost of $24.9 million for its Oklahoma City Streetcar.
In 2017, Brookville was awarded a $33 million contract to deliver six Liberty Streetcars for use on the forthcoming Tempe Streetcar and a $26.5 million contract from Sound Transit for five streetcars to be operated on the Tacoma Link line.
In March 2018, Brookville secured the sale of two Liberty Modern Streetcars to Portland Streetcar, and a third car was added to the order in December of that year. Construction of the three Portland cars was delayed by factors related to the COVID-19 pandemic, but all were delivered in 2023, the last in December.
In October 2015, the Liberty Modern Streetcar won the Technical Innovation of the Year award at the Light Rail Transit Association's Global Light Rail Awards in London.