Your late-night commute along State Route 91 just got a bit more complicated. From Cerritos to Gardena, Caltrans is scheduling multiple overnight lane reductions, connector closures, and ramp shutdowns this week as part of a major sign rehabilitation project.
Caltrans is conducting K-rail installation along SR-91 from Monday, March 23 through Saturday, March 28, 2026, as part of a $34 million project to upgrade signs, lighting, guardrails, and highway landscaping along a 14.7-mile stretch of the freeway in Los Angeles County.
🚗 Where & When to Expect Lane Reductions
Overnight lane closures will reduce SR-91 to two lanes in both directions between:
- Vermont Avenue in Gardena
- Orange County line at PM 20.7 in Cerritos
Rolling full closures of connectors and ramps will also occur as crews move between locations. Detour routes will be clearly marked.
🛣 Full Lane Closure Schedule
Monday Night, March 23 – Friday Morning, March 27
Eastbound SR-91
- Vermont Ave → I-710: up to 3 lanes closed, 11 p.m. – 5 a.m.
- I-710 → I-605: up to 3 lanes closed, 10 p.m. – 5 a.m.
- I-605 → Orange County line: up to 2 lanes closed, 10 p.m. – 5 a.m.
Westbound SR-91
- Atlantic Ave → Vermont Ave: up to 3 lanes closed, 9 p.m. – 5 a.m.
- I-605 → Atlantic Ave: up to 3 lanes closed, 10 p.m. – 5 a.m.
- Orange County line → I-605: up to 2 lanes closed, 11:59 p.m. – 4 a.m.
Friday Night, March 27 – Saturday Morning, March 28
Eastbound SR-91
- Vermont Ave → I-710: up to 3 lanes closed, 8 p.m. – 9 a.m.
- I-710 → I-605: up to 3 lanes closed, 11 p.m. – 7 a.m.
- I-605 → Orange County line: up to 3 lanes closed, 11:59 p.m. – 4 a.m.
Westbound SR-91
- Atlantic Ave → Vermont Ave: up to 3 lanes closed, 9 p.m. – 7 a.m.
- I-605 → Atlantic Ave: up to 3 lanes closed, 11 p.m. – 7 a.m.
- Orange County line → I-605: up to 2 lanes closed, 11:59 p.m. – 6 a.m.
🔗 Connector Closures
Monday Night, March 23 – Friday Morning, March 27
Eastbound SR-91
- To north/south I-110: 8 p.m. – 6 a.m.
- To south I-710: 8 p.m. – 6 a.m.
- To north I-710: 10 p.m. – 6 a.m.
- To south I-605: 8 p.m. – 6 a.m.
- To north I-605: 10 p.m. – 6 a.m.
- To north/south I-605: 11 p.m. – 5 a.m.
Westbound SR-91
- To north I-110: 9 p.m. – 5 a.m.
- To south I-110: 10 p.m. – 5 a.m.
- To south I-110/I-405: 11 p.m. – 4 a.m.
- To north/south I-710: 11 p.m. – 5 a.m.
Northbound I-110
- To east SR-91: 11 p.m. – 5 a.m.
- To west SR-91: 8 p.m. – 6 a.m.
Southbound I-110
- To west SR-91: 8 p.m. – 6 a.m.
- To east/west SR-91: 11 p.m. – 5 a.m.
Northbound I-605
- To east SR-91: 8 p.m. – 6 a.m.
Southbound I-605
- To east SR-91: 11 p.m. – 4 a.m.
- To west SR-91: 8 p.m. – 4 a.m.
Northbound I-710
- To west SR-91: 8 p.m. – 6 a.m.
Southbound I-710
- To west SR-91: 8 p.m. – 5 a.m.
(Friday night connector closures follow the same schedule with minor changes in times.)
⬆️ On-Ramp Closures
Eastbound SR-91
- Main Street, Avalon Blvd, Alameda St, Santa Fe Ave, Long Beach Blvd, Cherry Ave, Paramount Blvd, Downey Ave, Lakewood Blvd, Clark Ave, Bellflower Blvd, Studebaker Rd, Pioneer Blvd, Norwalk Blvd, Shoemaker Ave
- Varying times: 8 p.m. – 6 a.m., some until 8 a.m.
Westbound SR-91
- Main Street, Avalon Blvd, Central Ave, Long Beach Blvd, Atlantic Ave, Cherry Ave, Paramount Blvd, Downey Ave, Lakewood Blvd, Clark Ave, Artesia Ave, Carmenita Ave
- Varying times: 8 p.m. – 6 a.m., some until 8 a.m.
⬇️ Off-Ramp Closures
Eastbound SR-91
- Main Street, Avalon Blvd, Central Ave, Wilmington Ave, Acacia Ave, Alameda St, Santa Fe Ave, Long Beach Blvd, Cherry Ave, Paramount Blvd, Downey Ave, Lakewood Blvd, Pioneer Blvd, Norwalk Blvd, Bloomfield Ave, Carmenita Ave
- Varying times: 8 p.m. – 6 a.m., some until 7 a.m.
Westbound SR-91
- Main Street, Avalon Blvd, Wilmington Ave, Alameda/Santa Fe, Long Beach Blvd, Atlantic Ave, Cherry Ave, Paramount Blvd, Downey Ave, Lakewood Blvd, Clark Ave, Artesia Ave, Carmenita Ave
- Varying times: 8 p.m. – 6 a.m., some until 8 a.m.
📱 How to Check Before You Go
Because weather and operational factors can shift schedules, drivers are encouraged to check real-time updates before heading out via:
- 🌐 QuickMap.dot.ca.gov
- 📲 Caltrans QuickMap mobile app
- 🌐Sign up here for further notifications about the project.
Nearby residents and businesses should also anticipate temporary noise, dust, and vibrations during overnight construction.
🏗 Why It’s Happening: $34 Million Upgrade
This isn’t random construction. Caltrans is investing $34 million into a 14.7-mile stretch of SR-91 in Los Angeles County. The project will:
- Rehabilitate and upgrade roadside and overhead signs
- Improve lighting
- Restore highway landscaping
- Replace guardrails
- Enhance worker safety
The contractor, Security Paving Company, Inc., is leading the work. The project is expected to be completed in summer 2029.
🚦 Plan Ahead
Plan ahead if you travel SR-91 between Gardena and Cerritos this week. Overnight slowdowns, detours, and ramp closures may impact your commute. Consider leaving earlier, rerouting, or adjusting your travel times. Caltrans reminds drivers to “Be Work Zone Alert” and “Slow for the Cone Zone.”