blue-board
n.— «Travelers along Interstate 57 are subjected to food, fuel and lodging signage, along with tourist attractions. Following years of paperwork and waiting, signs are being installed at the Exit 71 mile marker, also known as the Benton-Christopher exit, that will feature some of the best the area has to offer. “We originally applied for the attraction signs—or blue-boards as they are called—five years ago.”» —“Wheels of progress turning: Attraction signs on the horizon” by Mona Sandefur Benton Evening News (Illinois) Feb. 11, 2008. (source: Double-Tongued Dictionary)
Further reading
A librarian opens a book and finds a mysterious invitation scribbled on the back of a business card. Another discovers a child’s letter to the Tooth Fairy, tucked into a book decades ago. What stories are left untold by these forgotten...
How colors got their names, and a strange way to write. The terms blue and orange arrived in English via French, so why didn’t we also adapt the French for black and white? • Not every example of writing goes in one direction across the page...