Florence Avenue Interchange

Project Map


Original bid amount: $79.2 million.

The Florence Avenue Bridge was widened from the existing four lanes to six lanes. The new bridge is also approximately three feet higher and 321 feet longer. Finally, pedestrian access was improved and on and off-ramps were reconstructed and realigned to accommodate the I-5 freeway widening.

The essential construction of this project is now complete. There will be a one-year period of plant establishment and some possible minor tasks over time. All new on and off ramps and all lanes on the new bridge are open to traffic.  There are four lanes open to traffic in each direction of I-5. The new HOV lanes are expected to open by mid-2022. Caltrans thanks the cities and residents of Santa Fe Springs and Downey for their cooperation and patience.

The new Florence Avenue loop on ramp to southbound I-5 opened to traffic on Thursday, May 13. Traffic may access the on ramp from either eastbound or westbound Florence Ave. with traffic signal control.

The northbound I-5 Florence Ave. on and off ramps opened to traffic on April 22, 2021.

Aerial view of interchange and freeway lanes below:

Video of vehicle exiting northbound I-5 at Florence Ave. off ramp on April 22 below:

Video of vehicles entering new Florence Ave. on ramp to northbound I-5 on April 22, below:

On northbound I-5 there are now four all-purpose traffic lanes on I-5 from north of Valley View Ave. to the Florence Ave. Bridge. Then there are three all purpose lanes, plus two auxiliary lanes connecting to the northbound and southbound I-605. Under the I-605 Bridge, I-5  reverts to four all-purpose lanes, plus a fifth auxiliary lane connecting traffic from I-605 to I-5. Then it reduces again to four all-purpose lanes.

On southbound I-5 there are now five lanes where traffic merges from the I-605 interchange until the Orr & Day railroad overhead. Then it changes to four all-purpose lanes until south of Alondra Boulevard, where it reduces to three lanes approaching the Valley View Avenue interchange project that remains under construction until mid-2022.

When the Valley View Avenue Project is complete in mid-2022, we will open the additional car pool / HOV (High Occupancy Vehicle) lanes to traffic. At that time:

  • On northbound I-5 there will be an HOV lane from Valley View Ave. to the Orr & Day railroad overhead.
  • On southbound I-5 there will be an HOV lane from south of the Florence Ave. Bridge to Valley View Ave.

Openings as of Wednesday, December 9:
Orr & Day south of Florence Avenue is now open to traffic.
Florence Avenue between Studebaker Road and Orr & Day now has three eastbound lanes and two westbound lanes open to traffic.
Traffic signals allowing turns in all directions are now active at the intersections of:
Florence Avenue at Orr & Day (south of Florence) and Florence Avenue at Fairford Avenue.

Video below from September 19:


Video below from July 28:

Video below from July 14:

Drone aerial video below from June 18:

Video below from June 9:

Video below from May 27:

Video slideshow below from May 1 & May 6:


Videos below from November 26, 2019 through May 6, 2020:

Photos below show progress on first segment of the second half of the bridge from November 19, 2019 through February 25, 2020:

Photos below show progress on second segment of the second half of the bridge from March 3 through April 1:

The beams have been placed to connect the two segments of the second half of the bridge over lanes of I-5. Video below from February 18:

Workers continue constructing the soffit (deck underside) and stem walls across the new steel beams on the bridge west of I-5. The two segments of the second half of the bridge are now connected. Video below from December 31, 2019 through March 3, 2020:

Crews have nearly completed lowering and constructing new lanes to run beneath the Florence Ave. Bridge west of I-5 and north of the bridge.  Video below from March 3 and March 24:


Southbound traffic was shifted to the new median lanes of I-5 from I-605 to north of Imperial Highway on the night of Nov. 18. Video below shows traffic flow after the lane shift:

Workers constructed the initial falsework (temporary frame support) for the first segment of the second half of the new Florence Ave. Bridge before moving topside. Videos below from November 5 and November 11:

We opened a new FOURTH freeway lane to traffic on northbound I-5 from Alondra Blvd. to the Orr & Day railroad overhead north of Imperial Highway. At that point, it narrows back down to three lanes. After completion of the Florence Ave. interchange, the northbound fourth lane will extend almost to to I-605. We also opened a fourth lane on southbound I-5 from north of Imperial Highway all the way to the Orange County line near Artesia Blvd.

The contractor excavated the median to lower the roadway surface up to four feet to pass under the second half of the new bridge.  Final concrete has been poured for the new lanes in the median. Video below shows 360 degree pan of new lanes from October 1:

The old freeway lanes in the median have been demolished. The old concrete is crushed by a machine into smaller aggregate to be recycled and placed as base for the new lanes. Caltrans recycles! Photos below:

The first half of the Florence Ave. Bridge with pedestrian walkway opened to traffic in November of 2017:

Florence Avenue Bridge Reconstruction – Final Configuration Map

Florence Final Configuration Map


Project Overview

The Santa Ana Freeway (Interstate 5) Florence Avenue Interchange Project will widen I-5 to add one High Occupancy Vehicle (HOV) or carpool lane, and one general purpose lane in each direction. The project extends through the cities of Downey and Santa Fe Springs to just north of the San Gabriel River Freeway (Interstate 605) bridge.

The freeway improvements include widening structures at Florence Avenue and Orr and Day Road, shoulder widening, median barriers, new on-ramp and off-ramp designs, and reconfiguring the Florence Avenue interchange at the I-5. The Florence Avenue overcrossing will be widened from four lanes to six lanes.

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