Posted on: August 27, 2017

UPDATED 1/30/18: Highway 1 Safety & Operational Improvement Project


Latest Update:

January 30, 2018

Seymour Street to Wavecrest Road (South) segment:

The finalized Environmental document, the Coastal Development Permit, and the Caltrans Permit Engineering and Evaluation Report (PEER) were signed off and presented to San Mateo County Transportation Agency (SMCTA). The funding agreement is planned to be presented to the City Council on February 20, 2018 along with the award of the final design agreement for preparation of plans and specifications for construction bids.  Advertisement for construction bids is planned for fall of 2018 and construction proceeding in early 2019.

Main Street to Spindrift Way (North) segment:

The City is in the process of preparing environmental studies and reports per the requirements of the California Environmental Quality Act. When completed, the documents will be circulated for review and comment by the public and agencies per State law. In parallel, the Caltrans PEER is being revised per Caltrans comments and will be resubmitted for approval. The funding agreement is expected to be executed in Spring, 2018.


The Highway 1 Safety and Operational Improvement Project is a set of roadway, signalization, and pedestrian/bicyclist features and upgrades designed to increase safety and improve traffic flow along Highway 1 through portions of Half Moon Bay. It will also provide for improved response times for emergency vehicles, and median landscaping for enhanced aesthetics. When completed, this project will provide safer turning and merging lanes, new traffic signals for safer pedestrian/bicycle crossing, and other pedestrian/bicycle safety improvements.

The project will address improvements on two segments along Highway 1 in Half Moon Bay:

For more information, contact Ray Razavi, City of Half Moon Bay at 650-726-8265 or

Project FAQs:

How does the Project help to address traffic congestion on Highway 1? 
The creation of merge/turn lanes along with the widening of the “pinch point” just north of North Main Street will help reduce traffic back-ups along Highway 1 (includes upgrade to a single lane in each direction with center left turn lane at selected locations).

What is the funding source for the Project’s elements? 
Half Moon Bay has received grant funding from the San Mateo County Transportation Authority (SMCTA) for a majority of the project elements. The private Pacific Ridge (Ailanto) development project is providing funding for the Terrace Avenue/Highway 1 improvements including signalization. The City intends to supplement grant funds with impact fees already provided.

What construction impacts are anticipated from the Project? 
The Project will include periodic, temporary lane closures, detours, and other traffic disruptions. Nearby neighbors should expect some noise, vibration, and dust. There may be periodic nighttime work. The City will require contractors to minimize impacts, including limiting construction start and end times, providing dust control and street sweeping, and using appropriate traffic control measures.

How was Terrace Avenue selected for a new traffic signal?
The Pacific Ridge (Ailanto) development project is required to install a traffic signal at Terrace Avenue/ Highway 1 as a condition of approval. In addition, the City’s traffic consultant collected extensive traffic data at the Terrace, Kehoe, and Grandview intersections with Highway 1, concluding that signalization is most warranted at Terrace (Caltrans agrees with that determination).

What is Caltrans’ role in the project? 
Since Highway 1 is owned by the State of California, Caltrans requires that the City provide reports, plans, and other materials to justify the need for improvements. Caltrans has completed several reviews of the traffic analyses provided the City’s traffic consultant, as well as the Project Engineering Evaluation Report (PEER) being prepared by other City consultants.

What are the steps in the Project? 
Presently, the City is in the final stages of completing the PEER for Caltrans’ review, and upon approval can request reimbursement from SMCTA for prospective design and construction work.

What is the anticipated Project schedule?

South segment: anticipated completion of environmental documents in January, 2017; construction begins summer, 2018. North segment: anticipated completion of environmental documents in February, 2018; construction begins spring, 2019.

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