But I was thinking about the sigma? = 6 connection on coins and the I.

It's very frustrating, that 6, since there's also another thing that stands for (that 11-something thing), and there's only two websites I've been able to hunt down that have that symbol standing for something, so that creates a slight source verification problem (I think the answers to each of the center symbols can be discovered on the Net).

But assuming the C-like symbol = 6 (I like that, btw, it's just that I can't find it anywhere else except at that one website, rrrgh!), what if we combine it with the I as is?

We could then get 6-I, or I-6. Which might be an interstate highway, I'm not sure.

Anyone good with roadmaps and landmarks along the winding roads? : ) Don't have one on me.