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Washington Street and Highway 101 Interchange Redesign

Sector: Road • Location: Petaluma, California, United States

Source: The Press Democrat

Project
Planned

A major redesign of the congested Washington Street interchange at Highway 101 in Petaluma, including a new northbound entrance ramp, a longer southbound exit ramp, new lights, and sound walls on the northwest and southeast sides of the intersection. The redesign aims to improve traffic flow on and off the highway and provide relief for crosstown traffic.

Status
Prospective
Sector
Road, Government
Location
Petaluma, California, United States of America
Updated
22 Jul 2026
Source
The Press Democrat

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Project Information

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The project “Washington Street and Highway 101 Interchange Redesign” is an infrastructure initiative in the Road sector, located in Petaluma, California, United States. Taiyo aggregates data on it from The Press Democrat.

Participants

Sponsoring Agency

Status

Original status

planned

Taiyo status

Prospective

Taiyo last update

2026-07-22

Contact

Not available for this record.

Description

Description

A major redesign of the congested Washington Street interchange at Highway 101 in Petaluma, including a new northbound entrance ramp, a longer southbound exit ramp, new lights, and sound walls on the northwest and southeast sides of the intersection. The redesign aims to improve traffic flow on and off the highway and provide relief for crosstown traffic.

Original sector

Transportation

Budget

Location

Country

United States of America (USA)

State

California

City

Petaluma

Source

Source

The Press Democrat

URL

More Details

Record type

Project

Sector

Road, Government

Article published date

2025-09-16

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