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I-105 ExpressLanes Project

The I-105 corridor experiences heavy demand during peak commute hours that exceeds its capacity. As a result, Metro and the California Department of Transportation (Caltrans) are preparing engineering studies and an Environmental Document to study the possible implementation of ExpressLanes along I-105 between I-405 and I-605. The project will also study the I-105 west of the I-405 to Sepulveda Bl and east of the I-605 to Studebaker Rd to identify potential signage locations and access points into the ExpressLanes.

This corridor traverses the cities of El Segundo, Inglewood, Hawthorne, Los Angeles, Lynwood, South Gate, Paramount, Downey, Norwalk, and unincorporated areas of Los Angeles County.


In 2015, Caltrans completed a Project Study Report/ Project Development Support (PSR/PDS) for the I-105 corridor to assess potential improvements. The PSR/PDS identified four alternatives including a no build, conversion of the existing High Occupancy Vehicle (HOV) lane into ExpressLanes, and the addition of a second ExpressLane in each direction.

In January 2017, the ExpressLanes Strategic Plan was presented to the Metro Board. The Strategic Plan identified three tiers of ExpressLanes projects, with Tier 1 projects showing the highest potential benefits. Tier 1 projects include the I-105, sections of the I-405 and I-605, and extensions of the existing I-10 and I-110 ExpressLanes. The PSR/PDS and ExpressLanes Strategic Plan can be found in the Reports tab.

Next, Metro and Caltrans began the preparation of the Environmental Impact Report/Environmental Assessment to evaluate the environmental effects of this project pursuant to the California Environmental Quality Act (CEQA) and the National Environmental Policy Act (NEPA). As part of this effort, Metro hosted public scoping meetings along the corridor in March 2018 to get input from the community on the proposed alternatives and project. Formal public comments were accepted during the scoping period. Access the meeting materials here.

Metro will continue providing opportunities for the public’s involvement through community meetings and attendance at various community events. Metro encourages the community to stay involved and sign-up to receive project updates.The I-105 ExpressLanes are included in Measure M, the local sales tax passed by Los Angeles County voters in 2016. Measure M provides $175 million for this project.

Metro and Caltrans are studying the following proposed Alternatives:

  • Alternative 1: Existing Conditions (No Build) Maintains its current condition with no changes. No additional travel lanes or ramp improvements would be implemented
  • Alternative 2: Convert HOV to One (1) ExpressLane Convert existing HOV lane to one ExpressLane in each direction with standard lane widths.
  • Alternative 3: Convert HOV to Two (2) ExpressLanes (Non-Standard Lane Widths) Convert existing HOV lanes to two ExpressLanes in each direction, with non-standard lane and shoulder widths.
  • Alternative 4: Convert HOV to Two (2) ExpressLanes (Standard Lane Widths) initially considered, however it was eliminated from further consideration as it would have resulted in unavoidable, significant environmental impacts.

The Project Approval/Environmental Document (PA/ED) for the I-105 ExpressLanes will encompass two components: the Project Report and the Environmental Document (ED). Metro and Caltrans anticipate preparing an EIR under CEQA, and an EA in accordance with NEPA. Concurrent with the PA/ED, a Concept of Operations (ConOps) and a Trac and Revenue (T&R) Study will also be prepared. The ConOps will dene operational policies, toll collection systems and facility design. The T&R will estimate toll rates and potential toll revenue for this corridor.

Metro formally initiated the Draft EIR/EA phase in March 2018 with public scoping meetings held along the corridor. Public involvement opportunities will continue to be available throughout the environmental process, including a series of public hearings and a comment period at the release of the Draft EIR/EA that will take place along the corridor to engage the community, solicit input and address questions.

Project Development Process

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The Los Angeles County Metropolitan Transportation Authority (Metro) and the California Department of Transportation (Caltrans) are preparing engineering studies and an Environmental Document (ED) to study the possible implementation of ExpressLanes along Interstate 105 (I-105) between Interstate 405 (I-405) and Interstate 605 (I-605). These efforts were kicked off with public scoping meetings in Spring 2018 and the release of the draft ED is anticipated in Summer/Fall 2019. Prior to the release of the ED, additional public involvement opportunities are being offered including a quick public survey (see details below) and Community Update Meetings in April 2019 (additional details will be forthcoming).

Take A Quick Survey

Please complete a quick survey to provide your feedback and receive project updates (optional), including information on the upcoming public participation opportunities.