Lowest-numbered route you haven't been on

[dlsterner]

After a pair of road trips (one to SE Virginia, one to Rochester NY), I have now joined the 400 club!

The lowest numbered route I haven't been on has increased from 379 to 411.

What's next?  US 411 is the obvious target.  I was surprised to notice that despite numerous trips to the area - including several vacations in the Smoky Mountains - that I had never driven on US 411.  (I've been on unsigned GA 411, but I don't count unsigned routes).  I also need 412, but PA 412 is near Allentown PA and shouldn't be too hard to get.