Florence Avenue Interchange


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 86% 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 first half of the Florence Ave. Bridge is complete. Construction of the second half of the Florence Avenue Bridge is underway and expected to be complete by the end of *June 2020.

Workers constructed the soffit (deck underside) and outer stem walls of the east segment of the second half of the bridge. They installed a rebar “mat” across the deck, installed rebar frames for stem walls across the center of the deck, covered the frames in lumber forms and completed a concrete pour the night of January 30. Workers then removed the lumber forms from the stem walls and placed them flat and covered the forms with a “mat” of rebar. Videos below from November 26, 2019 through March 24, 2020:

Photos below show progress from November 19, 2019 through February 25, 2020:

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:

Photos 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:

Photos below from February 25 through March 24:

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:

Photos below below from November 26, 2019 through March 24, 2020:

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:

Photos below show traffic before the lane shift Nov. 12 (left) and after the lane shift Nov. 19 (right):

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:

Photos below from 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. Map below:

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:

Photos below from July 30 through September 24:

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:

Paving of the future Florence Ave. on ramp to northbound I-5 is almost complete. Construction of that sound wall is complete. Construction of the following is also complete: Florence Ave. off ramp from northbound I-5; of the Florence Ave. on ramp to southbound I-5; retaining walls on both sides of the freeway. Photos below:

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.

Project Map

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