Florence Avenue Interchange

Project Map



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

Original bid amount: $79.2 million.

This project is 93% complete.Crews are now excavating  the closed lanes on the west side of I-5 to lower them up to four feet as they run beneath the new bridge.

Construction of the Florence Ave. Bridge is complete. The Florence Avenue interchange is expected to be open to traffic by late April 2021.

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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