What's the difference between gray and red dots on the new SC map?

The grey dots turn to red as the timeline advances in time. They are the new superchargers being added at that point in time.

 

In response to that question Elon said that grey means they are nearly done, maybe just waiting for permits, etc.

 

And they will be completed in the specified time frame. At least that seems to be the consensus.

 

Elon Musk answers:

 

As a UI/UX design person, I am fascinated that so many people were tripped up by the red dot / gray dot thing today, including reporters/analysts on today's press conference call. To me it made sense and I had no problem understanding what it was. But that doesn't mean it's a good design, and the fact that so many people were not 100% clear on the distinction between red and gray means the design, for lack of a better term, failed.

 

I understood what the colors signified after looking at it a minute or 2... I think it would have been better to designate the nearly/newly deployed SC in red and the existing in grey.

 

I thought the same thing...but a legend ought to be placed on the maps.

 

http://www.teslamotors.com/supercharger

Explain more about the time line... according to me, gray = in construction, red = in service.