Caltrans : Roadwork on CA-4 Westbound entering at Arnold Industrial Way (Concord). On Ramp closed until 6 AM. From 10:00 PM Tuesday, May 12, 2026 to 6:00 AM Wednesday, May 13, 2026.
A construction was reported on CA-4 W near Contra Costa on May 13, 2026 at 5:01 AM.
Caltrans : Roadwork on CA-4 Westbound entering at Arnold Industrial Way (Concord). On Ramp closed until 6 AM. From 10:00 PM Tuesday, May 12, 2026 to 6:00 AM Wednesday, May 13, 2026.
May 13, 5:15 AM
Source: 511_sfbay · ID 511.org/1493717
First seen May 13, 2026 5:15 AM