The Stenmark Drive on-ramp to Westbound I-580 near the Richmond– San Rafael Bridge is scheduled for a complete closure

Tentatively scheduled to begin 7 PM, Monday, June 1, 2026, through 7 PM, July 1, 2026

Contra Costa County - Caltrans District 4 construction is slated to implement a full closure of Stenmark Drive on-ramp to westbound I-580. For the protection of both construction workers and motoring public during the ongoing I-580 Richmond-San Rafael Bridge Open Road Tolling Project, starting the night of Monday, June 1, 2026, all vehicles must use the detour to WB I-580 via EB I-580 until July 1, 2026. This closure allows crews to safely prepare and modify the toll plaza area, which may require working near traffic lanes, moving heavy materials, or operating machinery. Please observe the reduced speed limit. A long-term full closure of the Stenmark Drive on-ramp to WB I-580 will be implemented at a later date. Sign up for closure updates here: Richmond San Rafael Bridge Open Road Tolling Project. Or visit the Richmond San Rafael Bridge Website.

Full Closure of Stenmark Drive on-ramp to Westbound I-580

• 7:00 PM, Monday June 1st through July 1st 2026
• All work is weather dependent and subject to change
• To search for current District 4 closure information, please click here.

Detour Information from Stenmark Drive to Westbound I-580:

• Go east on Stenmark Drive
• Take on-ramp to Eastbound I-580
• Take off-ramp to Canal Boulevard
• Go northbound on Canal Boulevard
• Take Canal Boulevard on-ramp onto Westbound I-580

Changeable Message Signs (CMS) will provide advance notice for motorists traveling in the area. Drivers may experience minor delays and are advised to plan ahead, prepare to merge and allow extra travel time. Be work zone alert, drive with caution through the work zone.

For 24/7 traffic updates, follow 511.org on X. For real-time traffic, visit Caltrans QuickMap at Quickmap.dot.ca.gov. To view more D4 Projects, visit: Caltrans D4 Traffic Advisory Publications.

To search for current District 4 lane closure information, please click here.

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