Hwy 101 E Washington St Closures for Sign Pole Installation


Nighttime Lane and Ramp Closures on Hwy 101 at E. Washington St. In Petaluma for Electronic Sign Installation

NB Hwy 101 lane and ramp closures at E. Washington St., Mon., March 7

SB Hwy 101 lane and ramp closures at E. Washington St., Tues. – Thurs., March 8-10


SONOMA COUNTY – As part of the Petaluma Widening Project on U.S. Highway 101 in Sonoma County, Caltrans will close the right lane and the auxiliary lane on northbound Highway 101 prior to the E. Washington Street off-ramp in Petaluma.  The off-ramp itself will also be closed.  The closures will occur between 8:00 PM, Monday, March 7 and 6:00 the following morning. 

E Washington Ramps


The following three nights, Tuesday, March 8 through Thursday, March 10, Caltrans will close the right lane (#2) of southbound Highway 101 and the off-ramp to E. Washington Street from 8:00 PM to 6:00 AM.  Traffic headed for the E. Washington Street ramp during closure hours will be detoured to Lakeville Highway (State Route 116). 

The closures will allow work crews to install poles that will hold electronic signs.

The new electronic signs are part of the Petaluma Widening Project in Sonoma County. Caltrans is widening the Highway 101 by adding a carpool lane to northbound and southbound Highway 101, creating a six-lane freeway of three lanes in each direction.

The project is one of 13 projects in the larger Marin/Sonoma Narrows widening project to add a carpool lane in each direction of Highway 101 between State Route 37 in Marin and Corona Road in northern Petaluma.

For 24/7 traffic updates, go to 511.org: https://twitter.com/511SFBay You can also get real-time information on all State Highways in California on our Caltrans Quick Map: http://quickmap.dot.ca.gov/  Please be #WorkZoneAlert


Or follow Caltrans on Twitter at https://twitter.com/CaltransD4

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