It is usually a good rule not to believe everything you read, especially when reading public travel information on display boards. Certainly not provide information that anybody can rely on. It's not that the quality of travel information is just a bit below par or that errors only occasionally occur. No, the information on matrix displays on our motorways, our railways and in our cities is so bad and so often wrong that users completely ignore it.
Examples are everywhere.
Motorway speed restriction signs switched on beside completely clear roads are so common that drivers dangerously ignore them. Indicator boards at Underground stations routinely display completely fictional arrival times. Or how about the ludicrous indicator at Waterloo East station in London. It is meant to show on which platform the next train will arrive. So inaccurate is it and so disbelieving are the passengers that they are forced to stand on the bridge straddling the platforms and sprint for the appropriate platform only when see the train actually pulling in.