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Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026.

A construction was reported on CA-4 W near Contra Costa on August 20, 2026 at 2:01 AM.

Address
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Started
Aug 19, 7:01 PM
Last Updated
2 months, 1 week ago
Aug 20, 4:30 AM
Resolved
Aug 20, 10:30 AM
Coordinates
37.9618, -121.7416
Update History
8 observations
Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026. Aug 20, 4:30 AM
Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026. Aug 20, 4:15 AM
Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026. Aug 20, 4:00 AM
Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026. Aug 20, 3:45 AM
Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026. Aug 20, 3:15 AM
Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026. Aug 20, 3:00 AM
Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026. Aug 20, 2:45 AM
Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 7:00 PM Wednesday, August 19, 2026 to 5:00 AM Thursday, August 20, 2026. Aug 20, 1:45 AM
Source: 511_sfbay · ID 511.org/1538198 First seen Aug 20, 2026 1:45 AM
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