Overview

San Diego Freeway (I-405) Improvement Project


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Today, the San Diego Freeway (I-405) is one of the most congested freeways in Orange County, carrying more than 300,000 vehicle trips in some sections each day. Traffic volumes on the I-405 are expected to increase significantly and the population is expected to grow 11 percent by 2040.

The California Department of Transportation (Caltrans), in cooperation with the Orange County Transportation Authority (OCTA), is proposing to widen the San Diego Freeway (I-405) between State Route 73 (SR-73) and Interstate 605 (I-605). The purpose of the proposed improvement is to improve travel conditions for work, recreation, school, and commerce by increasing freeway capacity, improving traffic and interchange operations, and enhancing road safety to meet state and federal standards. The I-405 Improvement Project is funded by Measure M Orange County’s half-cent sales tax for transportation improvements.

Project Alternatives

The I-405 Improvement Project draft environmental impact report/impact statement (EIR/EIS) was released on May 18, 2012 and included a no build and three build alternatives. Any project built will include at least one free lane in each direction as part of the I-405 Improvement Project that is funded through Measure M, the county’s half-cent sales tax for transportation.

No-Build Alternative

  • The No-Build alternative leaves the I-405 in its existing configuration with no additional lanes or interchange improvements. 

Alternative 1:  Add one general purpose (GP) lane in each direction

  • Alternative 1, the Measure M2 (M2) Project K as approved by the voters, adds one GP lane in each direction on the I-405 from Euclid Street to the Interstate 605 (I-605) interchange. 

Alternative 2:  Add two GP lanes in each direction

  • Alternative 2 is the M2 Project K with the addition of a second GP lane in the northbound direction from Brookhurst Street to the State Route 22 (SR-22) / 7th Street interchange, and the addition of a second GP lane in the southbound direction from the Seal Beach Boulevard on-ramp to Brookhurst Street. 

On January 26, 2009, the Orange County Transportation Authority (OCTA) Board of Directors (Board) approved the addition of Alternative 3 to significantly alleviate congestion and provide additional travel choices to commuters, as well as to help fund the overall Project during difficult economic times when M2 sales tax forecasts were dropping: 

Alternative 3: Add one GP lane and one high-occupancy toll (HOT)/ express lane in each direction

  • Alternative 3 includes M2 Project K and adds a HOT/express lane in each direction on I-405 from State Route 73 (SR-73) to SR-22. The HOT/express lane would be combined with the existing high-occupancy vehicle (HOV) lanes, and these would be converted to HOT/express lanes providing two HOT/express lanes in each direction on I-405 between SR-73 and I-605. The westbound HOV connector from SR-22 to I-405 would also be operated as a HOT/express lane.

Recent Project Timeline

On October 22, 2012, the Board of Directors recommended Alternative 1, Measure M2 Project K, which adds one general purpose lane in each direction.

On June 28, 2013, the Orange County Transportation Authority, in partnership with the California Department of Transportation, released a supplemental draft EIR/EIS which contained additional traffic information, largely in the Long Beach area, not previously contained in the original draft environmental impact report/environmental impact statement. Link to the Supplemental Draft EIR/EIS www.dot.ca.gov/dist12/405/index.htm

On December 9, 2013 the OCTA Board reaffirmed their recommendation of Alternative 1 as the Preferred Alternative to Caltrans.

Preferred Alternative
Caltrans is expected to recommend a Preferred Alternative in July 2014.

I-405 Schedule

Draft EIR/EIS
Public Review

May 18 to July 17, 2012

Supplemental Draft EIR/EIS Public Review

June 28 to August 12, 2013

OCTA Board Recommends Alternative 1

December 9, 2013

Caltrans Recommends Preferred Alternative

July 2014

Issue Design-Build Request for Qualifications

September 2014

Issue Design-Build Draft Request for Proposals

January 2015

Final EIR/EIS

February 2015

Issue Design-Build Request for Proposals

June 2015

Design-Build Award

February 2016

Design-Build Notice to Proceed

April 2016

Design/Construction

2016 to 2020

 

Christina Byrne

Project Contact

Christina Byrne
Manager of Community Outreach
(714) 560-5717
cbyrne@octa.net