Highway 101 Ramp Closures Alert

Posted on September 21, 2022

Road Work Sign Caltrans 9/21


Heads up, Petaluma! Caltrans has scheduled paving, striping and drainage work on Highway 101 causing periodic lane and ramp closures until late November 2022. 

The work will be taking place between Lakeville Highway and Old Redwood Highway, with most closures of off- and on-ramps occurring overnight. Occasional daytime ramp closures may be required, but all closures will be clearly signed regardless of time. Caltrans will add a final layer of open-graded pavement, providing better traction during wet weather.  

During closures, one lane will always remain open on the freeway in each direction. 

Mainline closures, as needed:  

NB101 – Hwy 116/Lakeville to north of Corona Rd, 6 PM to 2 PM 

SB101 – North Petaluma Blvd to Lakeville Hwy 116, 5 PM to 11 AM 

Ramps that may be occasionally closed:  

NB101 Offramp to East Washington, 10 PM to 8 AM 

NB101 – Loop Onramp from East Washington, 11 PM to 8 AM 

NB101 – Diagonal Onramp from East Washington, 11 PM to 8AM 

SB101 – Diagonal Onramp from North Petaluma Blvd, 7 PM to 6 AM 

SB101 – Offramp to East Washington, 11 PM to 7 AM 

SB101 – Onramp from East Washington, 8 PM to 8 AM 

SB101 – Offramp to Hwy 116/Lakeville, 11 PM to 7 AM 

For 24/7 traffic updates, go to 511.org.

You can also get real-time information on all State Highways in California on the Caltrans Quick Map: http://quickmap.dot.ca.gov.

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