They are still working on the Tioga Pass Road through Yosemite. Thick ice and a damaged road bed are making the process much more difficult than usual. The latest opening of the road in history is July 1. That might change this year.
Here's a link from the NPS about the situation: https://www.nps.gov/yose/planyourvisit/tioga.htm
And this will give you an idea of what the work is like---in a normal year!
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