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I-605 Corridor Improvement Project

I-605 Corridor Project

Project Overview

The San Gabriel River Freeway, Interstate 605 (I-605), between Interstate 10 (I-10) and Interstate 105 (I-105), is one of the busiest and most congested highways in the greater Los Angeles area. Projected growth in the region’s population and goods movement are expected to further deteriorate the traffic capacity and operations of I-605. To ease congestion and plan for future growth, operational and safety improvements are needed.

The Los Angeles County Metropolitan Transportation Authority (Metro) and California Department of Transportation (Caltrans), District 7, in collaboration with the Gateway Cities Council of Governments (GCCOG) and the San Gabriel Valley Council of Governments (SGVCOG), are proposing improvements to approximately 16 miles of highway located along I-605, from approximately I-10 to I-105. The I-605 Corridor Improvement Project also includes interchange related improvements along State Route 60 (SR-60), Interstate 5 (I-5), Interstate 10 (I-10), and Interstate 105 (I-105).

The proposed project will consider multiple alternatives. The proposed improvements will evaluate adding auxiliary lanes, a general purpose lane, one HOV and/or Express lanes, direct connectors at the I-605/I-10 and I-605/I-105 interchanges, and other improvements that enhance freeway safety and operations.

The project goals are to:

  • Ease congestion and add highway capacity where needed.
  • Improve freeway operations, mobility and travel times.
  • Enhance regional connectivity and highway interchange efficiency.
  • Improve and enhance travelers’ quality of life.

Project Funding

Project studies are being funded through local Measure R funds. Metro will also pursue additional Federal, State, and other sources for future phases of the project.