The phrase 'sign boards' is correct and usable in written English.
It refers to boards displaying signs, such as a billboard or shop sign. For example: The hazardous mountain path was clearly marked with sign boards warning hikers of the potential risks.
You fly past sign boards at speed without a thought.
The shoppers received colored dots of paper to post on sign boards beneath a tent, indicating their preferences and practices at markets.
"We had to close our website, change and add warning labels, bring down the sign boards we had recently made and put up in several places in Istanbul," he said.
Besides the electronic sign boards, the cars also have lighted maps, showing all the stops on the line and indicating the train's location along the line with a blinking light.
I'd thought of him as a very London artist, but during our conversation he places his work, with its paintings resembling homemade sign boards, in the world of the cheery, tawdry visual language of the English seaside.
The first modern list could very well be Arthur Rimbaud's recitation of favorite things in "A Season in Hell" (1873): "absurd paintings, door panels, stage sets, backdrops for acrobats, sign boards,... outdated literature, Church Latin, misspelled erotic books, novels of grandmothers.
The sign board outside Yankee Stadium in the Bronx already proclaims, "A Rod, Welcome to NY".
At a bus station outside, an electronic sign board said her bus would arrive in six minutes.
Athletes, however, can see how many red cards they have when they pass a sign board on the course.
As lucky ticket holders entered the lobby on Friday night, there was no official sign board announcing a cast change.
Drs. Dinesh and Savita Mittal, a husband and wife team, run the City Hospital there and advertised on their sign board that Dr. Dev Batra provided ultrasound tests.
