I-5 Freeway Expansion Project Construction

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Upcoming closures, detours and activity


An easier drive for Southern California commuters is in progress. As road closure information is received from Caltrans, details will be posted regarding the I-5 Freeway Expansion Project in the City of Norwalk (Carmenita, Rosecrans/Bloomfield, and Norwalk/Imperial/Pioneer). For information on other segments along the I-5 corridor, please click on the Caltrans website www.I-5info.com and scroll down the map to the area you are interested in. Also, if you would like instant notifications via email, please click on the left side of the I-5info.com website to register your email address and the particular location you are interested in. If you have any questions, concerns, or suggestions you would like the City to share with Caltrans, please let us know so that we can bring it to their attention. You can call City Hall at(562) 929-5944 or email us at administration@norwalkca.gov.


Click on I-5 South Project Overview to get a big-picture view of the expansion. For specific project areas affecting Norwalk residents, see below.


Week of February 18, 2018


Crews will continue overnight bridge construction and this week trucks will start delivering base, or gravel, to the work site. This work will require about three to four more weeks of nighttime full freeway closures on northbound and southbound I-5 between Norwalk Boulevard and I-605. Please note that work will include noise from construction equipment and back-up alarms.

Scheduled for the night of Monday, Feb. 19 through the night of Thursday, Feb. 22:

  • Northbound I-5 right lane closed from Norwalk Blvd to I-605 from 10 p.m. to 11:59 p.m.
  • Northbound I-5 all lanes closed from Norwalk Blvd to I-605 from 11:59 p.m. to 5 a.m. Traffic will be taken off at Norwalk Blvd.
  • Northbound I-605 connector ramp to southbound I-5 closed from 9 p.m. to 5 a.m.
  • Southbound I-605 connector ramp to southbound I-5 closed 9 p.m. to 5 a.m.

Overnight full freeway closures will also be added to the southbound I-5 as work progresses. The media and public will be notified of additional lane closures in advance.

These closures are scheduled for separate nights and will RE-OPEN at 5 a.m.each day. All work will be completed by 5 a.m. Friday, Feb. 23.


  • Northbound I-5 Detour: Exit northbound I-5 at Norwalk Boulevard off-ramp, west on Norwalk Boulevard / San Antonio Drive, west on Firestone Boulevard to the northbound I-605 on-ramp. Transition from northbound I-605 back onto I-5.
  • Southbound I-5 Detour: Southbound I-5 traffic will be directed onto southbound I-605, exit at Firestone Boulevard, east on Firestone Boulevard, east on Imperial Highway, south on southbound Frontage Road to the southbound I-5 on-ramp.

Detour map below: 

Florence Avenue 2-11-18

Trucks will start to deliver 25,000 tons of base, or gravel, from Sun Valley. This will be used to lay the base over which two separate layers of concrete will be poured when paving the new freeway lanes.

Construction of retaining walls along the Florence Ave. on ramp to northbound I-5 continues. Once the retaining walls are complete, the area against the walls will be backfilled. Then construction of the sound wall on top of the retaining wall near Longworth Avenue can begin. Construction of sound walls along the east side of I-5 in this area are projected to be complete around August.

Workers have been constructing forms on the outside of the rebar frames of the future retaining wall along the Florence Avenue on ramp to northbound I-5 (below):


Pile driving activity is complete for the retaining walls adjacent to the northbound I-5 Florence Avenue on-ramp on the east side of I-5. Crews have moved to the west side of I-5 alongside the southbound lanes where pile driving continues 700 feet away from the sound walls near Longworth Avenue. Pile driving should be complete in about three weeks.

Please be advised this work may be loud and disruptive due to equipment noise, vibration and pounding related to pile driving activity, and construction lighting (if equipment needs to be moved at nighttime). Pile driving activity will take place weekdays between 7 a.m. and 3:30 p.m

Crews are also constructing support columns for the second half of the Florence Avenue bridge on the west side of I-5. Completion of the second half of the bridge is projected for Fall of 2018.

Demolition of the Orr & Day bridge over the railroad tracks south of Florence Ave. continues for about two more weeks. Crews will also remove the stem wall.

Some excavation in the construction area continues, but there is currently no grading.


Construction on this project is 78% complete.

On the northbound I-5, the right hand lane will be closed overnight from Norwalk Boulevard to Pioneer Boulevard to allow delivery of grade (gravel) for three weeks per the following schedule:

Monday, Feb. 19 from 11:59 p.m. to 5 a.m.

Then, from 10 p.m. to 5 a.m. each night:
Tuesday, Feb. 20 through the night of Thursday, Feb. 22.
Sunday, Feb. 25 through the night of Thursday, March 1.
Sunday, March 4 through the night of Thursday, March 8.

These lane closures are scheduled for separate nights and the lane will re-open by 5 a.m. each morning.

These lane closures may combine with a full freeway closure each night starting at 11:59 p.m. between Norwalk Blvd. and I-605 for the I-5 Florence Avenue project.

Crews construct “approach slab” which will provide additional support for vehicles where the future northbound lanes of I-5 meet the Pioneer Boulevard Bridge (below):

A worker pours concrete into the form of barrier rail that will support the future soundwall on the Imperial Highway on ramp to northbound I-5 (below):


Grading and compacting of future lanes of northbound I-5 along the Imperial Highway on ramp and approaching the Pioneer Boulevard Bridge is mostly complete (below). This week trucks will deliver tens of thousands of tons of base, or gravel, that will provide the base for two separate layers of concrete when paving the new freeway lanes. Laying of base will last for two to three weeks.


A worker compacts the soil in a trench with drainage pipe along future barrier rail on northbound I-5 lanes at the Pioneer Boulevard Bridge (below):


New curb and gutter in front of Paddison Farms on the north side of Imperial Highway (below):


Contractors commenced construction of a retaining wall and sound wall along I-5 between the interstate and Mondon Avenue in the City of Norwalk (below). Construction will take place between Tina St. and Gem St. It will occur primarily Monday through Friday during the hours of 7 a.m. and 3 p.m. and is expected to continue through mid-May. We will update this web page if any nighttime work is required.

There are no planned lane closures on Mondon Avenue, but construction equipment may occasionally need to block the roadway. If so, traffic will be temporarily controlled with flagging. There will be construction noise from equipment.



Construction on this project is 97% complete. The work that remains will include landscaping, electrical work, striping and other finishing work.

Engineers from both Caltrans and the City of Norwalk worked together to expedite the reconfiguration of lanes on northbound Bloomfield Avenue approaching Firestone Boulevard at the I-5 bridge. There are now two left-turn lanes at the intersection with a protected left-turn signal. The center lane may turn left or continue straight (below):


Reminder: Trucks that weigh more than 10,00 pounds may not travel on Bloomfield Avenue north of Firestone Boulevard (below):



All work has been completed on the Carmenita Road Interchange project.


Construction on this project is 24% complete.

Sewer line and drainage work will continue on Arbor Place during the day for the next two weeks from 6:30 a.m. to 3 p.m. on the following schedule:

  • Monday Feb. 19 through Thursday Feb. 22.
  • Monday Feb. 26 through Thursday, March 1.

Vehicles will be permitted to access businesses on Arbor Place during those hours with flagging. Map below:


Along the northeast corner of the intersection of N. Firestone Blvd. at Valley View Ave., crews installed fencing along the north side of Firestone Blvd. and the east side of Valley View Ave. in preparation for construction of a pedestrian access. Portions of those parking lots will be used as a construction area until October (below):


Two driveways to the warehouse on the northeast corner of N. Firestone Boulevard at Valley View Avenue will be permanently blocked: The driveway from N. Firestone Boulevard and the first driveway on Valley View Avenue north of Firestone Boulevard (red line). The driveway into the parking lot on Valley View Avenue that is closest to Alondra Boulevard will remain open (green line).  When work is complete in October, the closed driveway on Valley View Ave. will be reconstructed and re-opened. Image below:


Crews finished pouring concrete on the second half of the slab bridge near Arbor Place, west of the railroad tracks. The concrete is covered and curing (below):


Construction of falsework for the Valley View Avenue Bridge west of the railroad tracks continues (below):


 Falsework on the Valley View Avenue bridge west of Arbor Place along old Valley View Avenue (below):


Upcoming Changes:

Valley View Avenue will be elevated to meet with the newly elevated Valley View Avenue Bridge. In turn, N. Firestone Boulevard will be elevated to meet Valley View Avenue. In preparation for these modifications, N. Firestone Blvd. will be reduced to one lane in each direction between Gateway Drive and Valley View Avenue as early as late February. Large trucks will not be permitted to drive on this portion of N. Firestone. Access to the entrance of the Holiday Inn La Mirada will remain open.

By mid-March, the existing N. Firestone Boulevard will close permanently between Knott Avenue and Trojan Way in La Mirada for demolition to prepare for the widening of I-5 through that area. N. Firestone Boulevard will be rebuilt to the east. The portion of the newly built N. Firestone Boulevard between Knott Avenue and Osmond Avenue is expected to open by early May.

The portion between Osmond Avenue and Trojan Way will remain closed for an additional year to allow demolition and reconstruction of the bridge over Coyote Creek. In preparation, flyers will be distributed to businesses in the immediate area and signs will be placed in strategic locations in the neighborhood advising of the forthcoming closure. Map below:


 Construction of two retaining walls south of the Valley View Avenue bridge by S. Firestone continues. Crews will pour concrete footings next week and continue abutment work on the Valley View Avenue bridge. .

*DISCLAIMER: Due to the dynamic nature of construction, please note that all dates and times are subject to change due to unforeseen operational factors or inclement weather.



For information regarding upcoming closures, detours and other construction activity, be sure to check out the project Google map. This map will be updated in real time, with the latest information regarding project construction. Click the image below to view the map.






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