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Gantry speed limits blank but cameras flashing motorists

Reported via mobile in the Sign issue (NH) category anonymously at 07:56, Friday 5 August 2022

Sent to National Highways less than a minute later

At approx 6:45 this morning (5/8/22) the gantry boards above the carriageway were blank, then briefly displayed 40mph while I and 3 other motorists (2 trucks, one van) approached at around 5-6 car lengths. The boards again went blank, but all three of us were flashed. Boards before/after were also blank, ie: indicating no hazard etc. Indicate possible failure of matrix/gantry boards.

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