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US 101 Sir Francis Drake & Tiburon On Ramps in Marin County Temporary Ramp and Lane Closures

Caltrans has started electrical work which is a part of the northbound US-101 Ramp Metering Project at the eastbound and westbound Tiburon Blvd on ramps and the Sir Francis Drake on ramp to northbound US-101 in Corte Madera, Mill Valley and Tiburon.

The work started Sunday, July 7 and will continue until Saturday, July 20.  For worker and public safety, some temporary lane and ramp closures will be required.

The closure schedule is as follows:

Sir Francis Drake On Ramp to Northbound US-101 – one lane closed Sunday, July 7 until Saturday, July 13

  • Sunday through Monday morning – 9:00 PM – 6:00 AM
  • Monday through Friday – 10:00 PM – 6:00 AM

Sir Francis Drake on Ramp to northbound US-101 – closed Sunday, July 14 until Saturday, July 20

  • Sunday through Monday morning – 9:00 PM – 6:00 AM
  • Monday through Friday – 10:00 PM – 6:00 AM

Eastbound and Westbound Tiburon Blvd On Ramp to Northbound US-101 – closed Sunday, July 14 until Saturday, July 20

  • Sunday through Friday morning – 9:00 PM – 6:00 AM
  • Friday night through Saturday – 9:00 PM – 7:00 AM

Please drive cautiously through the construction zone, leaving a safe traveling distance between your vehicle and the vehicle ahead of you. 

For real-time traffic updates:

Click-on Caltrans QuickMap 

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