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Emergency Roadway and Soundwall Repairs Prompt Temporary On-Ramp Closure on Southbound I-680 in Danville

Published:

Schedule: Tuesday, January 20, 2026, through June 2026 (weather permitting)

Contra Costa County — Caltrans District 4 has scheduled emergency repair work on southbound Interstate 680 (I-680) in the City of Danville, requiring a temporary closure of the El Cerro Boulevard on-ramp to southbound I-680.

This work is necessary to address roadway and soundwall conditions that require immediate attention to maintain safety. Construction activities will include emergency roadway repairs, soundwall repairs, and related work.

Ramp Closure Information

  • Location: El Cerro Boulevard on-ramp to southbound I-680
  • Date: Tuesday night, January 20, 2026, (Tentative Closure 1-21-2026)
  • Time: 9:00 PM to 5:00 AM
  • Please Note: One night is anticipated; up to two nights if necessary

Construction Schedule

Emergency repair work is expected to continue through June 2026, weather permitting.

  • Day Work: Monday–Friday, 7:00 AM to 3:30 PM
  • Night Work (as needed): 9:00 PM to 5:00 AM

What to Expect

  • Drivers may experience delays during work hours. Some activities may result in increased noise, lighting, or traffic-related impacts. Caltrans and its contractor will make every effort to minimize disruptions and complete the work safely and efficiently.
  • Motorists are encouraged to plan ahead, allow extra travel time, and drive cautiously through the work zone.

Detour Information

During the temporary closure of the El Cerro Boulevard on-ramp:

  • Motorists traveling to southbound I-680 should use alternate nearby on-ramps, including Stone Valley Road or Sycamore Valley Road, as appropriate.

Detour to SB I-680 From EB El Cerro Blvd.

Eastbound El Cerro Blvd Detour Plan: Continue EB underneath I-680. Left on NB I-680 On Ramp. Exit Stone Valley Road (Exit 42B). Left on Stone Valley Road. Left on SB I-680 On Ramp.

Detour to SB I-680 From WB El Cerro Blvd.

Westbound El Cerro Blvd Detour Plan: Continue WB towards I-680. Right on NB I-680 On Ramp. Exit Stone Valley Road (Exit 42B). Left on Stone Valley Raod. Left on SB I-680 On Ramp.

For real-time traffic conditions, closures, and detours, visit Caltrans QuickMap or follow 511.org for 24/7 traffic updates.
Caltrans appreciates the public’s patience during this essential safety work.

**All work is weather dependent and subject to change**

Changeable Message Signs (CMS) will provide advance notice for motorists traveling in the area. Be work zone alert, drive with caution through the work zone. For 24/7 traffic updates, follow 511.org on Twitter. For real-time traffic, visit Caltrans QuickMap.

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