Hi Bob W, this is one place where many hikers have taken the wrong route. This is the one place in the Sierra bound to have the most novice hikers who are unprepared with the proper planning, knowledge or essential tools.
If you read through this thread and those referenced, you can find multiple instances where hikers have taken the wrong turn at this particular junction.
It is ONLY at this one particular trail that it seems like an additional sign might possibly prevent a lost hiker situation.
We aren't talking about putting signs all over the place, and we aren't talking about helping the knowledgeable hiker. It is the hapless novices who are NOT paying attention that might be helped at this one particular point.