It's not scheduled to arrive until 2025, but a train down Broadway is finally on the way.

"As one of the largest infrastructure investments in B.C.’s history, the Broadway Subway will provide a huge boost to Metro Vancouver’s economy and liveability,” Mayor Gregor Robertson said today (September 4) quoted in a media release. “This enormous investment in Metro Vancouver’s transportation network has been a long time coming and will significantly reduce traffic congestion, cut commute times along the Broadway Corridor by half and further enhance our city’s economic competitiveness.”

The mayor's comments come as the city secures funding commitments for the project from both the federal and provincial governments.

At a news conference in Surrey this morning, Prime Minister Justin Trudeau and B.C. premier John Horgan announced more than $3 billion in support for transit projects.

The Broadway subway line is planned to run 5.7 kilometres, from Glen Drive (where it will connect to TransLink's existing Millennium Line), along Broadway to Arbutus Street. It will consist of six stations and add rail capacity to what has been calculated as the busiest bus route in North America.

"On opening day, the Broadway Subway will be able to carry more than three times the current capacity of the 99 B-Line bus service," the city's release reads. Construction is expected to begin in 2021.

In addition to the Broadway Subway, Trudeau and Horgan pledged funding for a light-rail line through Surrey.

The 10.5-kilometre line rill run along 104 Avenue from Guildford to Surrey Centre, and then turn down King George Highway to Newton. There will be 11 stations.

"Rapid transit is key to helping people get where they need to go quickly, so we can meet the needs of a growing region," Horgan said. "Cutting traffic and getting people and goods moving faster will unlock economic growth, while making our communities more affordable, accessible and clean."

For the Broadway Subway and Surrey's light-rail projects combined, the federal government has pledged $1.37 billion, B.C. is expected to pay $1.82 billion, and Translink, the City of Vancouver, and Surrey will together contribute $1.23 billion.