State Route 92 Sinkhole Repair

UPDATE- The work on the sinkhole is complete and two way traffic remains open. The truck climbing lane will be open when we transition the EB lane over to the North side, to facilitate reconstruction and upgrading of median barrier, and have k-rail separating EB and WB traffic end of February. This work is heavily weather dependent.  The median barrier work should be complete in March depending on any possible weather delays.

State Route 92 near Half Moon Bay in San Mateo County. Photograph shows one lane of traffic traveling in each direction while Caltrans works on the other side of a barrier alongside the roadway.

State Route 92 near Half Moon Bay, San Mateo County, a conventional two-lane highway west of State Route 35, developed a sinkhole in January 2023 related to significant weather events and a failed drain/ culvert. Crews were able to quickly fill the sinkhole and shift the roadway over to allow permanent repairs to be completed without impacting traffic. Traffic remains fully open in both directions. The majority of repair work is being completed from the side of the roadway and is not visible to motorists. This work method allows motorists and bicyclists to use SR-92 while repairs are completed.

This is an active construction area. Please use caution as crews continue repairs behind the barriers.

Work Required For Damage Repair

  • Installation of new 36” diameter cross drain pipe
  • Ground and slope stabilization
  • Re-establish lane configuration
  • Vegetation landscape work

The truck climbing lane remains closed for safe transportation of materials and equipment as crews complete repairs and address additional needs along the corridor. Caltrans crew members use heavy equipment as part of the repairs to damage caused by a sinkhole on State Route 92 near Half Moon Bay in San Mateo County.

Project Contact

For project questions, please contact:
Alejandro Lopez, Caltrans Public Information Officer