State Route 88 - Pine Grove Improvements Project

Project Description

The California Department of Transportation (Caltrans), Amador County, and the Amador County Transportation Commission (ACTC) propose to construct intersection modifications, lane reconfiguration, pedestrian and bicycle improvements, and general highway improvements along State Route 88 (SR 88) in the town of Pine Grove, located in Amador County, California.

The Revised Phase A has been developed that will provide operational improvements and congestion relief corridor-wide on SR 88 from near Ridge Road to Hilltop Road in the town of Pine Grove in Amador County, California. The total length of the Revised Phase A project is approximately one mile (PM 22.7/PM23.6). The revised Phase A proposes the following improvements:

  • Standard 8-foot shoulders and 12-foot lanes on SR 88 from east of Ridge Road to

    Hilltop Road.

  • Improving the pedestrian crossing near the Town Hall, just east of Irish Town Road, including the installation of a hybrid beacon.
  • Signalizing SR 88/Volcano Road intersection. Correcting the intersection skew to


  • Installing signal interconnect from Ridge Road to east of Volcano Road.
  • Constructing a sidewalk on the south side of SR 88 from Ridge Road to Irish Town Road; and sidewalks along both north and south sides of SR 88 from Irish Town Road to Pine Grove Elementary School.
  • Constructing retaining walls/curbs where necessary when the embankment/cut slope of the roadway and sidewalks would otherwise encroach into areas that have constraints.
  • Formalizing upcountry and down country bus stops.
  • On street parking near Town Hall.
  • Maintaining existing pavement and cross slopes at all locations that meet the American
  • Disabilities Act (ADA) requirements.
  • Constructing a one-lane outbound driveway to Volcano Road at Pine Grove Elementary School. The existing outbound driveway will be removed.


Location Map


Project Benefits


The purpose of the SR 88 Pine Grove Corridor Improvement Project is to:

  • Improve existing and future SR 88 operations
  • Alleviate existing congestion in the project area
  • Provide a transportation facility consistent with both Caltrans Standards, and the local, regional, and statewide plans


The SR 88 Pine Grove Corridor Improvement Project is needed because vehicle operations through the town of Pine Grove are projected to deteriorate to failing levels of service by 2044, resulting in unacceptable vehicle delays at key intersections (Climax Road, Ridge Road, and Volcano Road) affecting both local and regional traffic on SR 88. Widening shoulders to 8 feet are necessary to ensure consistency with current Caltrans roadway design standards and would accommodate a Class 3 bikeway throughout the project area.


Project Cost and Funding

The total project cost for Phase A is estimated at $14.4 million. Phase A is funded through a combination of State Transportation Improvements Program - Regional Improvement Program (RIP), Regional Surface Transportation Program, Demonstration, Congestion Mitigation, Highway Infrastructure Program, Local developer fees and RIP COVID relief funds.


Current Schedule

Ready – to – List (M460) Summer 2023
Approve Construction Contract (M500) Fall 2023
Project Completion (M600) Fall 2024


Project Status

The project is currently in the Design and Right-of-Way phases, which are targeted to complete in June 2023.


Project Contact

Caltrans District 10 - Public Information Office
Phone: (209) 948-7977


Title VI Information

The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964, as amended, the Civil Rights Restoration Act of 1987, and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).

Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.