Admittedly confusing assortment of transportation options, but I am posting in a separate thread as it has come up a few times recently in other threads:
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It looks like there will be transportation from Valley to Tuolumne Meadows in mornings until Sept 20 on the Tuolumne Hiker bus (see below). Late in year, be sure to call YARTS if you are depending on it. Reservations can be made on the Hiker shuttle up to 7 days in advance. Bad weather may change the days of service for both systems.
http://www.nps.gov/yose/planyourvisit/publictransportation.htm
YART schedule
http://www.yarts.com/schedule/2009/120hwy041809.pdf
Concession Bus Option (I assume DNC)
http://www.yosemitepark.com/Activities_GuidedBusTours_TuolumneMeadows.aspx
http://www.yosemitepark.com/Files/090701-Tuolumne_Meadows_Tour_and_Hikers_Bus.pdf
Once in Tuolumne Meadows, there is NPS shuttle (may end at different date than the DNC Hiker bus)
http://www.nps.gov/yose/planyourvisit/tmbus.htm
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