Original planning

The original plans for the Crenshaw Corridor project connected Wilshire Blvd to LAX. However, during the environmental review, Metro determined that if LRT were selected as the preferred mode, the cost for the entire route would exceed the project budget. In December 2009, the Metro Board decided on LRT as the preferred mode; as a result, the part of the corridor north of Exposition Boulevard was deferred until funds became available. This segment can be considered a "Phase Two" extension of the original line.

Any Phase Two extension would be expected to connect to the D Line, the first phase of which is currently under construction as part of the D Line Extension project.

Map of the combined K line and Northern Extension as envisioned in 2008

In May 2009, Metro released a report on the feasibility of an extension north to Wilshire Boulevard.^[4] It first screened two routes—one to Wilshire/La Brea, and another to Wilshire/Crenshaw. Through this screening, staff concluded that Wilshire/La Brea station would be more cost-effective and compatible with land uses and plans along it. Specifically, the report cited the following advantages of the La Brea route over the Crenshaw route:

• Greater residential and job density,
• Supportive land uses for a high-capacity subway,
• Stronger regional potential to link this corridor northward towards Hollywood in the future,
• Strong community support in the Hancock Park area and
• Fewer geotechnical soil impacts compared to the Hydrogen sulfide soil along Crenshaw Blvd north of Pico Boulevard.

In October 2010, the Metro Board voted to eliminate the Wilshire/Crenshaw station from the D Line Subway Extension project for similar reasons.^[5]

The 3.5-mile Wilshire/La Brea route heads north on Crenshaw to Venice, west on Venice to San Vicente, continuing northwest on San Vicente to La Brea, and then north on La Brea to Wilshire. It has three possible stations: Crenshaw/Adams (optional), Pico/San Vicente, and Wilshire/La Brea.

The feasibility report also allowed for two possible branches/extensions along La Brea Ave, Fairfax Ave, La Cienega Blvd, or San Vicente Blvd heading north of Wilshire into West Hollywood and/or Hollywood.

In November 2010, Metro staff produced an initial review of the feasibility of studying a new transit corridor to connect the Crenshaw Corridor to West Hollywood and/or Hollywood.^[6]

In May 2014, the West Hollywood City Council considered a proposal by Council members John Heilman and Jeffrey Prang to engage a lobbyist to promote the need for Metro rail services in West Hollywood. The Heilman/Prang proposal notes that "former Los Angeles Mayor Antonio Villaraigosa assured West Hollywood representatives that West Hollywood would be 'next in line.'"^[7] In 2015, the West Hollywood City Council launched the West Hollywood Advocates for Metro Rail (WHAM) as part of a campaign to win grassroots support for a Metro rail extension into the city.^[8]

In September 2016, in a letter to West Hollywood City Council member Lindsey Horvath, Metro CEO Phil Washington outlined several steps Metro is taking to make the Crenshaw/LAX northern extension "shovel ready" should county voters approve Measure M, a countywide ballot measure adding new transit projects and expediting others previously approved under Measure R.^[9]

Connection to Phase One

The final design of "Phase One" (the original project line south of Exposition Blvd to LAX) would determine how the Phase Two project could or would connect to Phase One. The original locally preferred alternative (LPA) for the Crenshaw/LAX Line from the draft environmental impact study (Draft EIS/EIR) specified an at-grade station at the Phase One Expo/Crenshaw terminus, with the Leimert Park tunnel ending several blocks south of that, near 39th Street. If Phase One were built per the LPA, then Phase Two would require the building of a new tunnel with a connection near 39th Street. This would need the north end of the Leimert Park tunnel to be outfitted with knockout panels to allow for the possible future extension north.^[10]

Metro also studied "Design Option 6" for Phase One, which would extend the Leimert Park tunnel north to the line's northern terminus at Exposition, with an underground station at Crenshaw/Exposition. This design option was selected so that Phase Two can connect to Phase One directly at the Crenshaw/Exposition station's tunnels. This design option increased the cost of the original Phase One project by $236 million.^[11]

Initial alternatives analysis

The July 2018 concepts released by Metro included five alternative plans for study. These included different alignments but the same mode, light rail, as Phase 1 of the Crenshaw-LAX Line was currently under construction as light rail. Of the original five, a "Vermont Route" option was dropped in October 2019 due to public comments. A hybrid San Vicente option was added at the same time. On August 17, 2020, Metro recommended three final alignments for environmental analysis and advanced conceptual engineering.^[12][13] The current three alternatives considered are all south to north routes:

The following table shows all potential metro stations and the alternatives for which they apply:

Intersection of La Cienega Boulevard and Beverly Boulevard. Possible station in Alt. 1

La Cienega Blvd. at Santa Monica Blvd. possible station for Alt. 1

Station Options[1] (North to South)	Alt 1: H-SV	Alt 2: FF	Alt 3: LB	Connecting rail services[15]
Hollywood Bowl	Y	Y	Y		Direct access to Hollywood Bowl. Added due to public comments.[13]
Hollywood/Highland (new connecting station to be built)	Y	Y	Y	B Line	Hollywood Boulevard Entertainment District, Dolby Theatre
La Brea/Santa Monica	Y	Y	Y		West Hollywood Gateway shopping, The Lot (OWN), Jim Henson Company Lot, Desilu Studios & Sunset Las Palmas Studios nearby.
Fairfax/Santa Monica	Y	Y	-		West Hollywood
San Vicente/Santa Monica	Y	-	-		West Hollywood Rainbow District, Pacific Design Center, The Troubadour
San Vicente/La Cienega/Beverly	Y	-	-		Cedars-Sinai Medical Center, Beverly Center, Melrose Avenue Shopping District
Fairfax/3rd St.	Y	Y	-		The Grove at Farmers Market, Television City, Holocaust Museum LA
La Brea/Beverly	-	-	Y		High-density neighborhood
Wilshire/Fairfax (under construction)	Y	Y	-	D Line	Los Angeles County Museum of Art, Museum Row, High-density neighborhood and retail
Wilshire/La Brea (under construction)	-	-	Y	D Line	High density neighborhood and retail, Hancock Park
San Vicente/Fairfax	Y	Y	-		Little Ethiopia, San Vicente Park
San Vicente/Venice/Pico	Y	Y	Y		Re-construct the former PE Pico/Rimpau "Vineyard Junction station; current Pico-Rimpau Bus Transfer Station at Mid-town Crossing Center
Crenshaw/Adams	Y	Y	Y		Mid-Density neighborhood
Expo/Crenshaw	Y	Y	Y	E Line	Continues south to LAX, the C Line and South Bay beach cities
Distance: Miles (Kilometers):	9.9 (15.9 km)	8.1 (13 km)	6.5 (10.4 km)

Advocacy

The city council approved a resolution in May 2018 to expedite its environmental study to speed up the approval process with Metro. Metro's 2018 budget included $500,000 to begin the draft environmental study for the extension project. Residents created the "West Hollywood Advocates for Metro Rail" to advocate a new light rail or rapid transit line along Santa Monica Boulevard.^[16] Former President of the Los Angeles City Council Herb Wesson wrote an op-ed piece in the Los Angeles Times advocating acceleration of the project.^[17] Local Los Angeles U.S. representative Adam Schiff also voiced his support for acceleration in a letter to then Metro CEO Philip Washington in March 2019.^[18]