A Highways Agency spokesman said: "As you approach the Dishforth Interchange there are already electronic signs, but drivers tend to ignore them. If there's a hold-up on one of the routes ahead, the new boards will give a clear message to prevent congestion. Because they're so big, people can't ignore them!"
Each of the new signs can display one of three different messages to redirect traffic. Their clever design features rotating horizontal slats similar to those already employed on modern advertising billboards.
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