State Route 99 Live Oak Streetscape, Safety and Roadway Improvement Project

LOOKING AHEAD: Be Alert for the Big Traffic Switch

Crews this coming week will be busy setting up the boulevard for heavy equipment for the start of long-awaited construction activity on the highway.

Beginning early Monday morning (May 3), crews will prepare to shift traffic to the west side of the existing roadway between Archer Avenue and Pennington Road (which will be in effect from May 1 to July 30). Elm and Archer will be closed to traffic to and from Highway 99.

In addition, traffic will be temporarily shifted to the west side of the existing roadway from Myrtle Street to just past Ramsdell Drive between May 1 and June 1. These traffic shifts will allow crews to repair and rehabilitate the existing highway.

To prepare for the new lane configuration, crews will be doing pavement marker, striping and K-rail installation work. Crews also will be setting up construction barricades and finish work on a temporary traffic signal at Elm Street.

Drivers should be aware that K-rail, or temporary concrete barriers, will be on both sides of the roadway in the construction zones. Traffic lanes will be narrower – from the usual 12 feet width to 11 feet. We’re reminding trucking operators about restrictions for oversized wide permit loads for haulers traveling through the city.

Access for residents and businesses will be provided through the construction area. There will be highway access to all businesses in the construction area. Look for signs directing customers to temporary entrances.

Meanwhile, crews this coming week will continue with gutter, sidewalk and parking bay work at various locations and underground service lines.

Our new website is up and running. Check it out for maps showing access to businesses in the construction area, business deals for consumers, photo simulations of the boulevard after construction and other information. You also may connect with the Live Oak 99 social media campaign – Facebook: (@LiveOak99)   Twitter: (Live_Oak_99)

For project questions, contact Gilbert Mohtes-Chan at (530) 682-6145, or call Caltrans Resident Engineer Dwayne Grandy at (530) 713-7814.

Please let your friends, family members, neighbors, associates and others know they can receive LiveOak99 construction updates emailed to their inbox every week by signing up with Caltrans Public Information Officer Gilbert Mohtes-Chan at 

Unexpected schedule changes may occur. For current information on roadwork, delays, road conditions and emergency closures, call the voice-activated Caltrans Highway Information Network (CHIN) at 1-800-427-7623 (ROAD) or visit Caltrans’ “QuickMap” 



May 3 – 6

State Route 99 (Sutter County) between Coleman Avenue and Nevada Street north: North- and southbound motorists may expect shoulder, auxiliary lane and lane restrictions at various times and locations from 6 a.m. Monday to 6 a.m. Thursday for K-rail installation.

May 2 – Summer 2021

State Route 99 (Sutter County) at Walker Way: Motorists may expect Walker closed at State Route 99 through summer 2021 for roadway construction. Motorists should use Ash Street or Archer Avenue as alternate routes.


Project Facts


  • Rehabilitate State Route 99 to a 40-year pavement life
  • Upgrade the drainage systems
  • Flatten the roadway cross slopes
  • Construct new continuous sidewalks
  • Improve traffic signals at three intersections of State Route 99 at Pennington Road, Elm Street and Kola Street
  • Create a pedestrian-focused downtown environment by enhancing parking and building access, wayfinding and signage, landscaping and facilities for bicyclists and pedestrians
  • Improve crosswalks, curbs, gutters, sidewalks and driveways
  • Upgrade curb ramps to current American with Disabilities Act (ADA) standards

Project Benefits

The project will make substantial improvements to the roadway, drainage systems and streetscape. The existing pavement shows signs of distress. The drainage systems need improvements, the pavement cross slopes fail to meet current standards and the existing curb ramps need to be upgraded to meet today’s Americans with Disabilities Act requirements. Three intersections require traffic signal improvements to enhance safety.

Funding Breakdown

Estimated total project cost - $36 million in local, state and federal funds

Project Schedule

Utility Relocation – 2019
Begin Construction – July 2020
Expected Completion – Fall 2021

Project News

09.17.21 Highway 99 Safety, Roadway Improvement Project Nears Completion Due to SB 1, Federal Grant

Project Contacts

Johny Tan, Project Manager
Phone: (530) 741-5120

Gilbert Mohtes-Chan, Public Information Officer
Phone: (530) 682-6145

Alison Schmidt, City of Live Oak – (530) 695-2112