From NPS:
Northside Drive is closed from Camp 4 to El Capitan Crossover due to a rockfall. Southside Drive is open to two-way traffic; use caution.
News article about the rockfall:
https://sierranewsonline.com/rockslide-closes-yosemite-roads-and-trails/
Video of the rockfall:
https://www.facebook.com/jim.hornibrook/videos/747127586840295
Leave No Trace