Install Three New Regulatory and/or Directional Signs for the Yosemite Valley Circulation System

This is a proposal to install three new signs intended to regulate speed, to indicate direction of travel, and to provide basic navigational instructions to park visitors along Southside, Sentinel, and Northside Drives in east Yosemite Valley. Excavation will be required for five 4 x 4-inch sign posts, at 9.43 cubic feet (0.35 cubic yards) per post hole, for a total disturbance volume of 48 cubic feet (1.75 cubic yards). The sign installations will be accompanied by other changes including temporary replacement of pre-existing signs, pavement striping, rumble stripping, and installation of barriers and other in-road dividers. These changes will be reversed when the pilot project is concluded in Fall 2022. Displaced soil will remain on site for the purpose of backfilling all post holes.

Additional work performed under this project includes:
• Archeological shovel probes in areas proposed for new post holes or grading
• Replacement of broken post near the intersection of Southside Drive and Sentinel Drive
A similar test of the circulation system was conducted mid-May to mid-October, 2021 (PEPC No. 102430). The sign installations are recommended by a professional traffic engineer and transportation planners for a safer and more intuitive operation in 2022, when visitation is expected to exceed 2021 counts; potentially by doubling.