From tomorrow, 8/28/2013, until after Labor Weekend, part of the Tioga Pass Road (120), from Crane Flat to White Wolf will be closed.

http://www.inciweb.org/incident/article/3660/20959/

This means that during the closure period there will be no access to Yosemite Valley from Tuolumne Meadows, or access to Tuolumne Meadows from Yosemite Valley.