How would you design a traffic/ road sign? All the elements of sign design you never thought of, come into play when you really start planning a better road sign. The idea isn't new. I've saved screen captures from the Wayback Machine from the older site (below). Glad to see someone else has taken up the idea and kept it going on another site. I'm linking there first so people can see what's new and contribute ideas of their own.
I used to send possible highway route signs to the owner of The Great International Highway makeover website, Mr. R. V. Droz, a while back. Well I found out recently that his email link at his website is inoperable. Rats. I hope it'll work well in the future.Source: International Highway Makeover 2 From the old site, by Robert V. Droz.
Highway route markers have gotten boring over time. In the 1940's, there were many varied shapes and colors. Many governments opted for the MUTCD default (circles) or plain blank squares. The justification for those sparse designs is that they provide for increased number visibility and easy recognition. True enough, but nothing says you can't design a useful sign that's graphically attractive. Linked below are many examples of potential re-designs.