Metro officials on Friday celebrated the start of construction on the second phase of the Purple Line extension to the Westside.

The subway extension is being built in three phases, and it’s just prep work, like moving power lines, that’s underway now for Phase No. 2, the stretch of the line that will run for 2.5 miles through Beverly Hills and Century City.

Major construction on the second phase is scheduled to start this spring, when crews will build a “launch area” for a boring machine that will burrow the tunnels starting from the future Century City/Constellation Station. The other phase two station will be at Wilshire and Rodeo in Beverly Hills.

For now, the Purple Line originates in Union Station in Downtown LA and ends at Wilshire and Western in Koreatown.

But when the third and final phase of construction is complete in 2026, the line will end at the Veterans Affairs West Los Angeles Medical Center—a projected 25-minute ride from Union Station, with easy access along the way to LACMA and UCLA.

Phase No. 2, which will cost $2.53 billion to build, is scheduled for completion in 2025.

Construction on the first phase of the extension, which will run from Wilshire and Western to Wilshire and La Cienega in Beverly Hills, is now 30 percent finished. You’ll be able to start riding that stretch in 2023.

Even though construction is already well underway, the Beverly Hills Unified School District is trying to force Metro to realign its route so that it doesn’t pass under Beverly Hills High School. “In its second lawsuit against the regional transportation agency in less that six months, the Beverly Hills Unified School District said the project could be harmful to its students,” the Los Angeles Daily News reports.