Here's a question I remember each time I visit YNP, then I come home and can't find a definitive answer. Maybe the best place to ask is here.
Driving through the Valley, I'm sure you notice the sign posts along the road. Often at trailheads: V1, V2, etc. On the Tioga Road, I seem to recall they are marked T1, T2, and there's at least one more letter prefixing the signs to the south.
Is there a list somewhere which provides a key to these markers? I've looked all over and can't seem to find one anywhere.
Thanks!